Additional information available:

WINDOW

   Divides the current window into two or more windows.

   Format

     SPLIT WINDOW  [window-count]

Additional information available:

Parameter

window-count
   Specifies the number of windows to create. The maximum size of a
   window depends on the size and type of the terminal screen you are
   using. The minimum size is one line of text and one line for the
   status line.

   The text cursor appears in the lowest of the new windows.