backup                  backup a file to backup/ folder, avoid
                        overwriting it.
bd                      Show demos
bd2pd                   Convert a bookdown project into a page down
                        project
bookdownplus            Create demo files for building books with R
                        bookdown package.
copyfolder              copy necessary files to the working directory
create                  Prepare a strict template skeleton to
                        contribute to bookdownplus
get_output              Available output formats besides pdf_book
get_template            Available templates.
include_image           Insert an image from a url
mail_font               A deprecated function
more_output             Simple version of get_output()
share                   Prepare a relaxed template folder to contribute
                        to bookdownplus
template                Simple version of get_template()
