When you use SXEmacs under X, you can open multiple windows and each window can display one buffer or multiple parts of one buffer. Each window will have its own mode line and echo area. At any one time there is only one selected window and the buffer it displays is the selected buffer. There are some commands for manipulating windows:
scroll-other-window).
delete-window).
That is a zero. If there is more than one Emacs frame, deleting the
sole remaining window on that frame deletes the frame as well. If the
current frame is the only frame, it is not deleted.
delete-other-windows). For example, if you use the Describe
variable option from the Help menu, the window will split
vertically and the bottom window will contain documentation for that
variable. After you are done looking at that variable's documentation
you might want to come back to your original single window. Just type
C-x 1 after your cursor is in the top window (the window which you
want to keep) and hit <RET>.
split-window-vertically). Both the windows will start
out by displaying the same buffer. The window in which you have your
cursor will be your selected window.
split-window-horizontally). A line of vertical bars will
separate the window.
switch-to-buffer-other-window. It will prompt you for a
buffername.
find-file-other-window. See Visiting. It will prompt you for a filename.
dired-other-window. See Dired.
mail-other-window, and its same-window version is C-x m.
See Sending Mail, for information on how
to Send Mail using SXEmacs. See Reading Mail With Rmail, for information on reading mail using
Rmail.
If you click the right button on the mouse on a mode line, you will get a menu with following options: