New entry for printing package.

Add header to ido and cua entries.
Added compatibility note to cua entry.

etc/NEWS

@@ -965,13 +965,17 @@ Meta and Alt:
 * New modes and packages in 21.4
 
 ---
-** The new ido package is an extension of the iswitchb package
-to do interactive opening of files and directories in addition to
-interactive buffer switching.  Ido is a superset of iswitchb (with a
-few exceptions), so don't enable both packages.
+** Ido mode is now part of the Emacs distribution.
+
+The ido (interactively do) package is an extension of the iswitchb
+package to do interactive opening of files and directories in addition
+to interactive buffer switching.  Ido is a superset of iswitchb (with
+a few exceptions), so don't enable both packages.
 
 ---
-** The new cua package provides CUA-like keybindings using C-x for
+** CUA mode is now part of the Emacs distribution.
+
+The new cua package provides CUA-like keybindings using C-x for
 cut (kill), C-c for copy, C-v for paste (yank), and C-z for undo.
 With cua, the region can be set and extended using shifted movement
 keys (like pc-selection-mode) and typed text replaces the active
@@ -1008,6 +1012,11 @@ kill, copy, yank, and undo.  If you want to use cua mode, but don't
 want the C-x, C-c, C-v, and C-z bindings, you may customize the
 `cua-enable-cua-keys' variable.
 
+Note: This version of cua mode is not backwards compatible with older
+versions of cua.el and cua-mode.el.  To ensure proper operation, you
+must remove older versions of cua.el or cua-mode.el as well as the
+loading and customization of those packages from the .emacs file.
+
 ** The new keypad setup package provides several common bindings for
 the numeric keypad which is available on most keyboards.  The numeric
 keypad typically has the digits 0 to 9, a decimal point, keys marked
@@ -1071,6 +1080,15 @@ to C-c C-f and C-c C-i.  The C-c C-i subcommands now have duplicate
 bindings on control characters--thus, C-c C-i C-b is the same as
 C-c C-i b, and so on.
 
+** The printing package is now part of the Emacs distribution.
+
+If you enable the printing package by including (require 'printing) in
+the .emacs file, the normal Print item on the File menu is replaced
+with a Print sub-menu which allows you to preview output through
+ghostview, use ghostscript to print (if you don't have a PostScript
+printer) or send directly to printer a PostScript code generated by
+`ps-print' package.  Use M-x pr-help for more information.
+
 +++
 ** Calc is now part of the Emacs distribution.