(Select Buffer): Document even-window-heights and

display-buffer-reuse-frames.

man/buffers.texi

@@ -68,10 +68,6 @@ Similar, but select @var{buffer} in a separate frame
 (@code{switch-to-buffer-other-frame}).
 @end table
 
-@kindex C-x 4 b
-@findex switch-to-buffer-other-window
-@kindex C-x 5 b
-@findex switch-to-buffer-other-frame
 @kindex C-x b
 @findex switch-to-buffer
   To select the buffer named @var{bufname}, type @kbd{C-x b @var{bufname}
@@ -81,6 +77,34 @@ name you want (@pxref{Completion}).  An empty argument to @kbd{C-x b}
 specifies the most recently selected buffer that is not displayed in any
 window.@refill
 
+@kindex C-x 4 b
+@findex switch-to-buffer-other-window
+@vindex even-window-heights
+  To select a buffer in a window other than the current one, type
+@kbd{C-x 4 b @var{bufname} @key{RET}}.  This runs the command
+@code{switch-to-buffer-other-window} which displays the buffer
+@var{bufname} in another window.  By default, if displaying the buffer
+causes two vertically adjacent windows to be displayed, the heights of
+those windows are evened out; to countermand that and preserve the
+window configuration, set the variable @code{even-window-heights} to
+@code{nil}.
+
+@kindex C-x 5 b
+@findex switch-to-buffer-other-frame
+  Similarly, @kbd{C-x 5 b @var{buffer} @key{RET}} runs the command
+@code{switch-to-buffer-other-frame} which selects a buffer in another
+frame.
+
+@vindex display-buffer-reuse-frames
+  You can control how certain buffers are handled by these commands by
+customizing the variables @code{special-display-buffer-names},
+@code{special-display-regexps}, @code{same-window-buffer-names}, and
+@code{same-window-regexps}.  See @ref{Force Same Window}, and
+@ref{Special Buffer Frames}, for more about these variables.  In
+addition, if the value of @code{display-buffer-reuse-frames} is
+non-@code{nil}, and the buffer you want to switch to is already
+displayed in some frame, Emacs will raise that frame.
+
   Most buffers are created by visiting files, or by Emacs commands that
 want to display some text, but you can also create a buffer explicitly
 by typing @kbd{C-x b @var{bufname} @key{RET}}.  This makes a new, empty