** Tooltips.
Tooltips are small X windows displaying a help string at the current
-mouse position. To use them, use the Lisp package `tooltip' which you
-can access via the user option `tooltip-mode'.
+mouse position. The Lisp package `tooltip' implements them. You can
+turn them off via the user option `tooltip-mode'.
Tooltips also provides support for GUD debugging. If activated,
variable values can be displayed in tooltips by pointing at them with
*** ph.el has been obsoleted by EUDC and removed.
+\f
+* Incompatible Lisp changes
+
+There are a few Lisp changes which are not backwards-compatible and
+may require changes to existing code. Here is a list for reference.
+
+** Since `format' preserves text properties, the idiom
+`(format %s foo)' no longer works to remove properties.
+
+** Since the `keymap' text property now has significance, some code
+which uses both `local-map' and `keymap' properties (for portability)
+may, for instance, give rise to duplicate menus when the keymaps from
+these properties are active.
+
+** The change in the treatment of non_ASCII characters in search
+ranges may affect some code.
\f
* Lisp changes made after edition 2.6 of the Emacs Lisp Manual,
(Display-related features are described in a page of their own below.)
VOLUME must be an integer in the range 0..100 or a float in the range
0..1. This property is optional.
+- `:device DEVICE'
+
+DEVICE is a string specifying the system device on which to play the
+sound. The default device is system-dependent.
+
Other properties are ignored.
+An alternative interface is called as
+(play-sound-file FILE &optional VOLUME DEVICE).
+
** `multimedia' is a new Finder keyword and Custom group.
** keywordp is a new predicate to test efficiently for an object being