\f
* Changes in Emacs 21.1
+** `browse-url-gnome-moz' is a new option for
+`browse-url-browser-function', invoking Mozilla in GNOME.
+
++++
** The new global minor mode `auto-image-file-mode' allows image files
to be visited as images.
++++
** The functions `keep-lines', `flush-lines' and `how-many' now
operate on the active region in Transient Mark mode.
remains visible even when the buffer has been scrolled. This behavior
may be disabled by customizing the option `Info-use-header-line'.
++++
** `gnus-user-agent' is a new possibility for `mail-user-agent'. It
is like `message-user-agent', but with all the Gnus paraphernalia.
** The recommended way of using Iswitchb is via the new global minor
mode `iswitchb-mode'.
++++
** Gnus changes.
The Gnus NEWS entries are short, but they reflect sweeping changes in
regular expression. The mode is then determined as the mode
associated with that interpreter in `interpreter-mode-alist'.
++++
** C-down-mouse-3 is bound differently. Now if the menu bar is not
displayed it pops up a menu containing the items which would be on the
menu bar. If the menu bar is displayed, it pops up the major mode
and related parameters like frequency and delay can be customized in
the group `cursor'.
++++
** New font-lock support mode `jit-lock-mode'.
This support mode is roughly equivalent to `lazy-lock' but is
`automatic-hscrolling' is set (the default). This setting can be
customized.
++++
** Tool bar support.
Emacs supports a tool bar at the top of a frame under X. For details