@c This is part of the Emacs manual.
-@c Copyright (C) 1985-1987, 1993-1995, 1997, 2000-2012
-@c Free Software Foundation, Inc.
+@c Copyright (C) 1985-1987, 1993-1995, 1997, 2000-2015 Free Software
+@c Foundation, Inc.
@c See file emacs.texi for copying conditions.
-@node Windows, Frames, Buffers, Top
+@node Windows
@chapter Multiple Windows
@cindex windows in Emacs
@cindex multiple windows in Emacs
At any time, one Emacs window is the @dfn{selected window}; the
buffer this window is displaying is the current buffer. On graphical
displays, the point is indicated by a solid blinking cursor in the
-selected window, and by a hollow box in non-selected windows. On
-text-only terminals, the cursor is drawn only in the selected window.
+selected window, and by a hollow box in non-selected windows. On text
+terminals, the cursor is drawn only in the selected window.
@xref{Cursor Display}.
Commands to move point affect the value of point for the selected
Split the selected window into two windows, positioned side by side
(@code{split-window-right}).
@item C-Mouse-2
-In the mode line or scroll bar of a window, split that window.
+In the mode line of a window, split that window.
@end table
@kindex C-x 2
On text terminals, side-by-side windows are separated by a vertical
divider which is drawn using the @code{vertical-border} face.
+@kindex C-Mouse-2 @r{(mode line)}
@kindex C-Mouse-2 @r{(scroll bar)}
- You can also split a window horizontally or vertically by clicking
-@kbd{C-Mouse-2} in the mode line or the scroll bar. If you click on
-the mode line, that puts the vertical divider where you click; if you
-click in the scroll bar, that puts the new mode-line where you click.
+ If you click @kbd{C-Mouse-2} in the mode line of a window, that
+splits the window, putting a vertical divider where you click.
+Depending on how Emacs is compiled, you can also split a window by
+clicking @kbd{C-Mouse-2} in the scroll bar, which puts a horizontal
+divider where you click (this feature does not work when Emacs uses
+GTK+ scroll bars).
+
+@vindex window-resize-pixelwise
+ By default, when you split a window, Emacs gives each of the
+resulting windows dimensions that are an integral multiple of the
+default font size of the frame. That might subdivide the screen
+estate unevenly between the resulting windows. If you set the
+variable @code{window-resize-pixelwise} to a non-@code{nil} value,
+Emacs will give each window the same number of pixels (give or take
+one pixel if the initial dimension was an odd number of pixels). Note
+that when a frame's pixel size is not a multiple of the frame's
+character size, at least one window may get resized pixelwise even if
+this option is @code{nil}.
@node Other Window
@section Using Other Windows
@kindex C-x o
@findex other-window
With the keyboard, you can switch windows by typing @kbd{C-x o}
-(@code{other-window}). That is an @kbd{o}, for ``other,'' not a zero.
+(@code{other-window}). That is an @kbd{o}, for ``other'', not a zero.
When there are more than two windows, this command moves through all the
windows in a cyclic order, generally top to bottom and left to right.
After the rightmost and bottommost window, it goes back to the one at
the space that it occupied is given to an adjacent window (but not the
minibuffer window, even if that is active at the time). Deleting the
window has no effect on the buffer it used to display; the buffer
-continues to exist, and you can still switch to with @kbd{C-x b}.
+continues to exist, and you can still switch to it with @kbd{C-x b}.
@findex kill-buffer-and-window
@kindex C-x 4 0
without changing the height of the frame. With a positive numeric
argument, this command increases the window height by that many lines;
with a negative argument, it reduces the height by that many lines.
-If there are no vertically adjacent windows (i.e. the window is at the
+If there are no vertically adjacent windows (i.e., the window is at the
full frame height), that signals an error. The command also signals
an error if you attempt to reduce the height of any window below a
certain minimum number of lines, specified by the variable
@findex display-buffer
Some commands try to display ``intelligently'', trying not to take
-over the selected window, e.g. by splitting off a new window and
+over the selected window, e.g., by splitting off a new window and
displaying the desired buffer there. Such commands, which include the
various help commands (@pxref{Help}), work by calling
@code{display-buffer} internally. @xref{Window Choice}, for details.
expression to the list @code{same-window-regexps}. By default, these
variables are @code{nil}, so this step is skipped.
-@vindex display-buffer-reuse-frames
@item
Otherwise, if the buffer is already displayed in an existing window,
``reuse'' that window. Normally, only windows on the selected frame
are considered, but windows on other frames are also reusable if you
-change @code{display-buffer-reuse-frames} to @code{t}, or if you
change @code{pop-up-frames} (see below) to @code{t}.
-@item
-Otherwise, if you specified that the buffer should be displayed in a
-special frame by customizing @code{special-display-buffer-names} or
-@code{special-display-regexps}, do so. @xref{Choosing Window
-Options,,, elisp, The Emacs Lisp Reference Manual}.
-
@vindex pop-up-frames
@item
Otherwise, optionally create a new frame and display the buffer there.
@cindex undoing window configuration changes
@cindex window configuration changes, undoing
Winner mode is a global minor mode that records the changes in the
-window configuration (i.e. how the frames are partitioned into
+window configuration (i.e., how the frames are partitioned into
windows), so that you can ``undo'' them. You can toggle Winner mode
with @kbd{M-x winner-mode}, or by customizing the variable
@code{winner-mode}. When the mode is enabled, @kbd{C-c left}
The Windmove package defines commands for moving directionally
between neighboring windows in a frame. @kbd{M-x windmove-right}
selects the window immediately to the right of the currently selected
-one, and similarly for the ``left,'' ``up,'' and ``down''
+one, and similarly for the ``left'', ``up'', and ``down''
counterparts. @kbd{M-x windmove-default-keybindings} binds these
commands to @kbd{S-right} etc.; doing so disables shift selection for
those keys (@pxref{Shift Selection}).