just xref to Buffer Menus.
Delete mention of C-x 5 1 in `Creating Frames'.
@table @kbd
@item C-Mouse-1
@kindex C-Mouse-1
-@findex msb-mode
-@cindex MSB minor mode
-@cindex mode, MSB
This menu is for selecting a buffer.
-The MSB (`mouse select buffer') global minor mode alters this menu to a
-form some people prefer and which is customizable. See the Custom group
-@code{msb} (@pxref{Easy Customization}).
+The MSB (``mouse select buffer'') global minor mode makes this
+menu smarter and more customizable. @xref{Buffer Menus}.
@item C-Mouse-2
@kindex C-Mouse-2
buffer to select:
@table @kbd
-@item C-x 5 1
-@kindex C-x 5 1
-@findex delete-other-frames
-Delete all frames except the selected one (@code{delete-other-frames}).
@item C-x 5 2
@kindex C-x 5 2
@findex make-frame-command