bump version to 0.9.0 & update docs
diff --git a/man/footnote.Rd b/man/footnote.Rd
index cdd514e..cabcb12 100644
--- a/man/footnote.Rd
+++ b/man/footnote.Rd
@@ -8,7 +8,7 @@
   symbol = NULL, footnote_order = c("general", "number", "alphabet",
   "symbol"), footnote_as_chunk = FALSE, escape = TRUE,
   threeparttable = FALSE, general_title = "Note: ", number_title = "",
-  alphabet_title = "", symbol_title = "")
+  alphabet_title = "", symbol_title = "", title_format = "italic")
 }
 \arguments{
 \item{kable_input}{HTML or LaTeX table generated by \code{knitr::kable}}
@@ -47,6 +47,9 @@
 \item{alphabet_title}{Section header for alphabet footnotes. Default is "".}
 
 \item{symbol_title}{Section header for symbol footnotes. Default is "".}
+
+\item{title_format}{Choose from "italic"(default), "bold" and "underline".
+Multiple options are possible.}
 }
 \description{
 \code{footnote} provides a more flexible way to add footnote. You