Give people ability to customize title format in footnote
diff --git a/R/footnote.R b/R/footnote.R
index a7e2aa2..5d1e363 100644
--- a/R/footnote.R
+++ b/R/footnote.R
@@ -29,6 +29,8 @@
 #' @param number_title Section header for number footnotes. Default is "".
 #' @param alphabet_title Section header for alphabet footnotes. Default is "".
 #' @param symbol_title Section header for symbol footnotes. Default is "".
+#' @param title_format Choose from "italic"(default), "bold" and "underline".
+#' Multiple options are possible.
 #'
 #'
 #' @examples dt <- mtcars[1:5, 1:5]
@@ -48,7 +50,8 @@
                      general_title = "Note: ",
                      number_title = "",
                      alphabet_title = "",
-                     symbol_title = ""
+                     symbol_title = "",
+                     title_format = "italic"
 ) {
   kable_format <- attr(kable_input, "format")
   if (!kable_format %in% c("html", "latex")) {
@@ -90,6 +93,10 @@
       footnote_titles <- lapply(footnote_titles, linebreak)
     }
   }
+  title_format <- match.arg(title_format, c("italic", "bold", "underline"),
+                            several.ok = TRUE)
+  footnote_titles <- lapply(footnote_titles, footnote_title_format,
+                            kable_format, title_format)
   footnote_table <- footnote_table_maker(
     kable_format, footnote_titles, footnote_contents
   )
@@ -102,6 +109,36 @@
   }
 }
 
+footnote_title_format <- function(x, format, title_format) {
+  if (x == "") return(x)
+  if (format == "html") {
+    title_style <- ""
+    if ("italic" %in% title_format) {
+      title_style <- paste0(title_style, "font-style: italic;")
+    }
+    if ("bold" %in% title_format) {
+      title_style <- paste0(title_style, "font-weight: bold;")
+    }
+    if ("underline" %in% title_format) {
+      title_style <- paste0(title_style, "text-decoration: underline;")
+    }
+    return(paste0(
+      '<span style="', title_style, '">', x, '</span>'
+    ))
+  } else {
+    if ("italic" %in% title_format) {
+      x <- paste0("\\\\textit\\{", x, "\\}")
+    }
+    if ("bold" %in% title_format) {
+      x <- paste0("\\\\textbf\\{", x, "\\}")
+    }
+    if ("underline" %in% title_format) {
+      x <- paste0("\\\\underline\\{", x, "\\}")
+    }
+    return(x)
+  }
+}
+
 footnote_table_maker <- function(format, footnote_titles, footnote_contents) {
   number_index <- read.csv(system.file("symbol_index.csv",
                                        package = "kableExtra"))
@@ -176,7 +213,7 @@
     paste0('<sup>', x[1], '</sup> ', x[2])
   })
   if (ft_title != "") {
-    title_text <- paste0('<em>', ft_title, '</em>')
+    title_text <- ft_title
     footnote_text <- c(title_text, footnote_text)
   }
   if (!ft_chunk) {
@@ -285,7 +322,7 @@
     }
   })
   if (ft_title != "") {
-    title_text <- paste0('\\\\textit{', ft_title, '} ')
+    title_text <- ft_title
     footnote_text <- c(title_text, footnote_text)
   }
   if (!ft_chunk) {
@@ -311,7 +348,7 @@
     }
   })
   if (ft_title != "") {
-    title_text <- paste0('\\\\item \\\\textit{', ft_title, '} ')
+    title_text <- paste0('\\\\item ', ft_title, ' ')
     footnote_text <- c(title_text, footnote_text)
   }
   footnote_text <- paste0(footnote_text, collapse = "\n")