Add more commands to the new `C-x x' keymap

* doc/emacs/killing.texi (Accumulating Text):
* doc/emacs/display.texi (Line Truncation):
* doc/emacs/buffers.texi (Misc Buffer): Document it.

* lisp/bindings.el (ctl-x-x-map): Add new bindings for
rename-buffer, rename-uniquely, insert-buffer and
toggle-truncate-lines.

doc/emacs/buffers.texi

@@ -232,9 +232,9 @@ unless they visit files: such buffers are used internally by Emacs.
 @table @kbd
 @item C-x C-q
 Toggle read-only status of buffer (@code{read-only-mode}).
-@item M-x rename-buffer @key{RET} @var{buffer} @key{RET}
+@item C-x x r @key{RET} @var{buffer} @key{RET}
 Change the name of the current buffer.
-@item M-x rename-uniquely
+@item C-x x u
 Rename the current buffer by adding @samp{<@var{number}>} to the end.
 @item M-x view-buffer @key{RET} @var{buffer} @key{RET}
 Scroll through buffer @var{buffer}.  @xref{View Mode}.
@@ -263,28 +263,28 @@ non-@code{nil} value, making the buffer read-only with @kbd{C-x C-q}
 also enables View mode in the buffer (@pxref{View Mode}).
 
 @findex rename-buffer
-  @kbd{M-x rename-buffer} changes the name of the current buffer.  You
-specify the new name as a minibuffer argument; there is no default.
-If you specify a name that is in use for some other buffer, an error
-happens and no renaming is done.
+  @kbd{C-x x r} (@code{rename-buffer} changes the name of the current
+buffer.  You specify the new name as a minibuffer argument; there is
+no default.  If you specify a name that is in use for some other
+buffer, an error happens and no renaming is done.
 
 @findex rename-uniquely
-  @kbd{M-x rename-uniquely} renames the current buffer to a similar
-name with a numeric suffix added to make it both different and unique.
-This command does not need an argument.  It is useful for creating
-multiple shell buffers: if you rename the @file{*shell*} buffer, then
-do @kbd{M-x shell} again, it makes a new shell buffer named
-@file{*shell*}; meanwhile, the old shell buffer continues to exist
-under its new name.  This method is also good for mail buffers,
+  @kbd{C-x x u} (@code{rename-uniquely}) renames the current buffer to
+a similar name with a numeric suffix added to make it both different
+and unique.  This command does not need an argument.  It is useful for
+creating multiple shell buffers: if you rename the @file{*shell*}
+buffer, then do @kbd{M-x shell} again, it makes a new shell buffer
+named @file{*shell*}; meanwhile, the old shell buffer continues to
+exist under its new name.  This method is also good for mail buffers,
 compilation buffers, and most Emacs features that create special
 buffers with particular names.  (With some of these features, such as
 @kbd{M-x compile}, @kbd{M-x grep}, you need to switch to some other
 buffer before using the command again, otherwise it will reuse the
 current buffer despite the name change.)
 
-  The commands @kbd{M-x append-to-buffer} and @kbd{M-x insert-buffer}
-can also be used to copy text from one buffer to another.
-@xref{Accumulating Text}.
+  The commands @kbd{M-x append-to-buffer} and @kbd{C-x x i}
+(@code{insert-buffer}) can also be used to copy text from one buffer
+to another.  @xref{Accumulating Text}.
 
 @node Kill Buffer
 @section Killing Buffers

doc/emacs/display.texi

@@ -1755,13 +1755,13 @@ and/or leftmost columns.
 @findex toggle-truncate-lines
   Horizontal scrolling automatically causes line truncation
 (@pxref{Horizontal Scrolling}).  You can explicitly enable line
-truncation for a particular buffer with the command @kbd{M-x
-toggle-truncate-lines}.  This works by locally changing the variable
-@code{truncate-lines}.  If that variable is non-@code{nil}, long lines
-are truncated; if it is @code{nil}, they are continued onto multiple
-screen lines.  Setting the variable @code{truncate-lines} in any way
-makes it local to the current buffer; until that time, the default
-value, which is normally @code{nil}, is in effect.
+truncation for a particular buffer with the command @kbd{C-x x t}
+(@code{toggle-truncate-lines}).  This works by locally changing the
+variable @code{truncate-lines}.  If that variable is non-@code{nil},
+long lines are truncated; if it is @code{nil}, they are continued onto
+multiple screen lines.  Setting the variable @code{truncate-lines} in
+any way makes it local to the current buffer; until that time, the
+default value, which is normally @code{nil}, is in effect.
 
   If a split window becomes too narrow, Emacs may automatically enable
 line truncation.  @xref{Split Window}, for the variable

doc/emacs/killing.texi

@@ -703,13 +703,13 @@ copy-to-buffer} is similar, except that any existing text in the other
 buffer is deleted, so the buffer is left containing just the text newly
 copied into it.
 
-  The command @kbd{M-x insert-buffer} can be used to retrieve the
-accumulated text from another buffer.  This prompts for the name of a
-buffer, and inserts a copy of all the text in that buffer into the
-current buffer at point, leaving point at the beginning of the
-inserted text.  It also adds the position of the end of the inserted
-text to the mark ring, without activating the mark.  @xref{Buffers},
-for background information on buffers.
+  The command @kbd{C-x x i} (@code{insert-buffer}) can be used to
+retrieve the accumulated text from another buffer.  This prompts for
+the name of a buffer, and inserts a copy of all the text in that
+buffer into the current buffer at point, leaving point at the
+beginning of the inserted text.  It also adds the position of the end
+of the inserted text to the mark ring, without activating the mark.
+@xref{Buffers}, for background information on buffers.
 
   Instead of accumulating text in a buffer, you can append text
 directly into a file with @kbd{M-x append-to-file}.  This prompts for

etc/NEWS

@@ -234,7 +234,11 @@ still applies for shorter search strings, which avoids flicker in the
 search buffer due to too many matches being highlighted.
 
 +++
-** 'revert-buffer' is now bound to 'C-x x g' globally.
+** A new keymap for buffer actions has been added.
+The 'C-x x' keymap now holds keystrokes for various buffer-oriented
+commands.  The new keystrokes are 'C-x x g' ('revert-buffer'),
+'C-x x r' ('rename-buffer'), 'C-x x u' ('rename-uniquely'),
+'C-x x i' ('insert-buffer') and 'C-x x t' ('toggle-truncate-lines').
 
 
 * Editing Changes in Emacs 28.1

lisp/bindings.el

@@ -1416,6 +1416,10 @@ if `inhibit-field-text-motion' is non-nil."
 (defvar ctl-x-x-map
   (let ((map (make-sparse-keymap)))
     (define-key map "g" #'revert-buffer)
+    (define-key map "r" #'rename-buffer)
+    (define-key map "u" #'rename-uniquely)
+    (define-key map "i" #'insert-buffer)
+    (define-key map "t" #'toggle-truncate-lines)
     map)
   "Keymap for subcommands of C-x x.")
 (define-key ctl-x-map "x" ctl-x-x-map)