Add extra customization options to add_header_above
diff --git a/man/xtable2kable.Rd b/man/xtable2kable.Rd
new file mode 100644
index 0000000..faf3281
--- /dev/null
+++ b/man/xtable2kable.Rd
@@ -0,0 +1,35 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/xtable2kable.R
+\name{xtable2kable}
+\alias{xtable2kable}
+\title{Convert xtable to a kable object}
+\usage{
+xtable2kable(x, ...)
+}
+\arguments{
+\item{x}{an xtable object}
+
+\item{...}{options for print.xtable}
+}
+\description{
+This function allow users to turn an xtable object into a kable
+so they can use most of kableExtra's functions with their xtable code without
+making too many changes. Note that although I tested many cases and it seems
+to work, this function may not be functional in some other cases. I'm not
+a regular xtable user and can only provide very limited support for this
+function.
+
+You should use this table in the same way as \code{print.xtable}. All the options
+you provided to this function will be sent to \code{print.xtable}. Instead of
+printing out the result, this function will return the LaTeX or HTML as
+text and a kable object.
+}
+\examples{
+\dontrun{
+library(xtable)
+xtable(mtcars) \%>\%
+ xtable2kable(booktabs = TRUE) \%>\%
+ kable_styling(latex_options = "striped")
+}
+
+}