-sections of that buffer. Also if point moves outside a window, it
-moves automatically to another window which shows that part of the
-buffer, if any. Thus, the windows act like one large window on
-the buffer.
-
- One use of this feature is to effectively double the number of lines
-in a given screen height, using side-by-side windows on the same
-buffer. First split a window into side-by-side windows with @kbd{C-x
-3}, then use @kbd{M-x follow-mode} to synchronize the windows.