Add footnote theme parameters

- Also reorder code params

R/duo.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `secondary_color`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `secondary_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `primary_color`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(secondary_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `secondary_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(secondary_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = secondary_color,
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = secondary_color,
   inverse_text_color = primary_color,
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(secondary_color, 0.6),
   left_column_selected_color = secondary_color,
   blockquote_left_color = apply_alpha(secondary_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/duo_accent.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `choose_dark_or_light(secondary_color, primary_color, secondary_color)`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `secondary_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `choose_dark_or_light(secondary_color, black_color, white_color)`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(primary_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `primary_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(secondary_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = choose_dark_or_light(secondary_color, primary_color, secondary_color),
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = secondary_color,
   inverse_text_color = choose_dark_or_light(secondary_color, black_color, white_color),
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(primary_color, 0.6),
   left_column_selected_color = primary_color,
   blockquote_left_color = apply_alpha(secondary_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/duo_accent_inverse.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `choose_dark_or_light(secondary_color, secondary_color, primary_color)`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `secondary_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `choose_dark_or_light(secondary_color, black_color, white_color)`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(primary_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `primary_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(secondary_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = choose_dark_or_light(secondary_color, secondary_color, primary_color),
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = secondary_color,
   inverse_text_color = choose_dark_or_light(secondary_color, black_color, white_color),
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(primary_color, 0.6),
   left_column_selected_color = primary_color,
   blockquote_left_color = apply_alpha(secondary_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/mono_accent.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `base_color`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `base_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `white_color`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(base_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `base_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(base_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = base_color,
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = base_color,
   inverse_text_color = white_color,
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(base_color, 0.6),
   left_column_selected_color = base_color,
   blockquote_left_color = apply_alpha(base_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/mono_accent_inverse.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `base_color`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `base_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `black_color`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(base_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `base_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(base_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = base_color,
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = base_color,
   inverse_text_color = black_color,
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(base_color, 0.6),
   left_column_selected_color = base_color,
   blockquote_left_color = apply_alpha(base_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/mono_dark.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `base_color`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `base_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `black_color`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(base_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `base_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(base_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = base_color,
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = base_color,
   inverse_text_color = black_color,
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(base_color, 0.6),
   left_column_selected_color = base_color,
   blockquote_left_color = apply_alpha(base_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/mono_light.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to `base_color`
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to `base_color`
 #' @param inverse_text_color Inverse Text Color, defaults to `white_color`
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to `apply_alpha(base_color, 0.6)`
 #' @param left_column_selected_color Left Column Current Selection, defaults to `base_color`
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to `apply_alpha(base_color, 0.5)`
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = base_color,
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = base_color,
   inverse_text_color = white_color,
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = apply_alpha(base_color, 0.6),
   left_column_selected_color = base_color,
   blockquote_left_color = apply_alpha(base_color, 0.5),
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/solarized_dark.R

 #' @param code_highlight_color Code Line Highlight, defaults to #268bd240
 #' @param code_inline_color Inline Code Color, defaults to #6c71c4
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to #fdf6e3
 #' @param inverse_text_color Inverse Text Color, defaults to #002b36
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to #586e75
 #' @param left_column_selected_color Left Column Current Selection, defaults to #93a1a1
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to #cb4b16
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "#268bd240",
   code_inline_color = "#6c71c4",
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = "#fdf6e3",
   inverse_text_color = "#002b36",
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = "#586e75",
   left_column_selected_color = "#93a1a1",
   blockquote_left_color = "#cb4b16",
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/solarized_light.R

 #' @param code_highlight_color Code Line Highlight, defaults to #268bd240
 #' @param code_inline_color Inline Code Color, defaults to #6c71c4
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to #002b36
 #' @param inverse_text_color Inverse Text Color, defaults to #fdf6e3
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to #93a1a1
 #' @param left_column_selected_color Left Column Current Selection, defaults to #586e75
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to #cb4b16
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "#268bd240",
   code_inline_color = "#6c71c4",
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = "#002b36",
   inverse_text_color = "#fdf6e3",
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = "#93a1a1",
   left_column_selected_color = "#586e75",
   blockquote_left_color = "#cb4b16",
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

R/theme_settings.R

   , "code_highlight_color", "rgba(255,255,0,0.5)", ".remark-code-line-highlighted", "Code Line Highlight"
   , "code_inline_color", "#000", ".remark-inline-code", "Inline Code Color"
   , "code_inline_background_color", NA_character_, ".remark-inline-code", "Inline Code Background Color"
+  , "code_inline_font_size", "1em", ".remark-inline-code", "Inline Code Text Font Size"
   , "inverse_background_color", "#272822", ".inverse", "Inverse Background Color"
   , "inverse_text_color", "#d6d6d6", ".inverse", "Inverse Text Color"
   , "inverse_text_shadow", "{FALSE}", ".inverse", "Enables Shadow on text of inverse slides"
   , "title_slide_background_image", NA_character_, ".title-slide", "Title Slide Background Image URL"
   , "title_slide_background_size", NA_character_, ".title-slide", "Title Slide Background Image Size, defaults to \"cover\" if background image is set"
   , "title_slide_background_position", NA_character_, ".title-slide", "Title Slide Background Image Position"
+  , "footnote_color", NA_character_, ".footnote", "Footnote text color (if \\code{NA}, then it will be the same color as \\code{text_color}`)"
+  , "footnote_font_size", "90%", ".footnote", "Footnote font size"
+  , "footnote_position_bottom", "3em", ".footnote", "Footnote location from bottom of screen"
   , "left_column_subtle_color", "#777", ".left-column", "Left Column Text (not last)"
   , "left_column_selected_color", "#000", ".left-column h2:last-of-type, .left-column h3:last-child", "Left Column Current Selection"
   , "blockquote_left_color", "lightgray", "blockquote", "Blockquote Left Border Color"
   , "header_h2_font_size", "45px", ".remark-slide-content h2", "h2 Header Text Font Size"
   , "header_h3_font_size", "35px", ".remark-slide-content h3", "h3 Header Text Font Size"
   , "text_slide_number_font_size", "0.9em", ".remark-slide-number", "Slide Number Text Font Size"
-  , "code_inline_font_size", "1em", ".remark-inline-code", "Inline Code Text Font Size"
-  , "code_font_size", "0.9em", ".remark-inline", "Code Text Font Size"
   , "text_font_google", NULL, "body", "Use `google_font()` to specify body font"
   , "text_font_family", "'Droid Serif'", "body", "Body Text Font Family"
   , "text_font_weight", "normal", "body", "Body Text Font Weight"
   , "header_font_url", "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz", "@import url", "Header Font URL"
   , "code_font_google", NULL, "body", "Use `google_font()` to specify code font"
   , "code_font_family", "'Source Code Pro'", ".remark-code, .remark-inline-code", "Code Font Family"
+  , "code_font_size", "0.9em", ".remark-inline", "Code Text Font Size"
   , "code_font_url", "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700", "@import url", "Code Font URL"
   , "code_font_family_fallback", "'Lucida Console', Monaco", ".remark-code, .remark-inline-code", "Code Font Fallback"
 )

R/write_theme.R

 #' @param code_highlight_color Code Line Highlight, defaults to rgba(255,255,0,0.5)
 #' @param code_inline_color Inline Code Color, defaults to #000
 #' @param code_inline_background_color Inline Code Background Color, defaults to NA
+#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
 #' @param inverse_background_color Inverse Background Color, defaults to #272822
 #' @param inverse_text_color Inverse Text Color, defaults to #d6d6d6
 #' @param inverse_text_shadow Enables Shadow on text of inverse slides, defaults to `FALSE`
 #' @param title_slide_background_image Title Slide Background Image URL, defaults to NA
 #' @param title_slide_background_size Title Slide Background Image Size, defaults to "cover" if background image is set, defaults to NA
 #' @param title_slide_background_position Title Slide Background Image Position, defaults to NA
+#' @param footnote_color Footnote text color (if \code{NA}, then it will be the same color as \code{text_color}`), defaults to NA
+#' @param footnote_font_size Footnote font size, defaults to 90%
+#' @param footnote_position_bottom Footnote location from bottom of screen, defaults to 3em
 #' @param left_column_subtle_color Left Column Text (not last), defaults to #777
 #' @param left_column_selected_color Left Column Current Selection, defaults to #000
 #' @param blockquote_left_color Blockquote Left Border Color, defaults to lightgray
 #' @param header_h2_font_size h2 Header Text Font Size, defaults to 45px
 #' @param header_h3_font_size h3 Header Text Font Size, defaults to 35px
 #' @param text_slide_number_font_size Slide Number Text Font Size, defaults to 0.9em
-#' @param code_inline_font_size Inline Code Text Font Size, defaults to 1em
-#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param text_font_google Use `google_font()` to specify body font, defaults to `NULL`
 #' @param text_font_family Body Text Font Family, defaults to 'Droid Serif'
 #' @param text_font_weight Body Text Font Weight, defaults to normal
 #' @param header_font_url Header Font URL, defaults to https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz
 #' @param code_font_google Use `google_font()` to specify code font, defaults to `NULL`
 #' @param code_font_family Code Font Family, defaults to 'Source Code Pro'
+#' @param code_font_size Code Text Font Size, defaults to 0.9em
 #' @param code_font_url Code Font URL, defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700
 #' @param code_font_family_fallback Code Font Fallback, defaults to 'Lucida Console', Monaco
 #' @template extra_css
   code_highlight_color = "rgba(255,255,0,0.5)",
   code_inline_color = "#000",
   code_inline_background_color = NA,
+  code_inline_font_size = "1em",
   inverse_background_color = "#272822",
   inverse_text_color = "#d6d6d6",
   inverse_text_shadow = FALSE,
   title_slide_background_image = NA,
   title_slide_background_size = NA,
   title_slide_background_position = NA,
+  footnote_color = NA,
+  footnote_font_size = "90%",
+  footnote_position_bottom = "3em",
   left_column_subtle_color = "#777",
   left_column_selected_color = "#000",
   blockquote_left_color = "lightgray",
   header_h2_font_size = "45px",
   header_h3_font_size = "35px",
   text_slide_number_font_size = "0.9em",
-  code_inline_font_size = "1em",
-  code_font_size = "0.9em",
   text_font_google = NULL,
   text_font_family = "'Droid Serif'",
   text_font_weight = "normal",
   header_font_url = "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
   code_font_google = NULL,
   code_font_family = "'Source Code Pro'",
+  code_font_size = "0.9em",
   code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
   code_font_family_fallback = "'Lucida Console', Monaco",
   extra_css = NULL,

inst/resources/template.css

   text-decoration: none;
 }
 .footnote {
+  {{ifelse(!is.na(footnote_color), paste0("color: ", footnote_color, ";"), ""}}
   position: absolute;
-  bottom: 3em;
+  bottom: {{footnote_position_bottom}};
   padding-right: 4em;
-  font-size: 90%;
+  font-size: {{footnote_font_size}};
 }
 .remark-code-line-highlighted {
   background-color: {{code_highlight_color}};