This tutorial, the fifth in a series, shows you how to manage and manipulate the shape your Emacs session—examine how to partition the Emacs screen, create multiple X client windows for a single Emacs session, and display multiple buffers in each window, dividing the screen with horizontal and vertical divisions. You also learn about mouse window control and characteristics so that by the time you're through, you can make your Emacs session look and work the way you want it to.
Traditionally, Unix/Linux/POSIX filenames can be almost any sequence of bytes, and their meaning is unassigned. The only real rules are that "/" is always the directory separator, and that filenames can't contain byte 0 (because this is the terminator). Although this is flexible, this creates many unnecessary problems. In particular, this lack of limitations makes it unnecessarily difficult to write correct programs (enabling many security flaws), makes it impossible to consistently and accurately display filenames, causes portability problems, and confuses users. more ....
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