mh-next-button
mh-next-button is an interactive autoloaded compiled Lisp function in `mh-folder.el
'.
(mh-next-button &optional BACKWARD-FLAG)
Go to the next button.
If the end of the buffer is reached then the search wraps over to
the start of the buffer.
If an optional prefix argument BACKWARD-FLAG is given, the cursor
will move to the previous button.