EGA Lines                                      Manual page 135
Alt + F9

 This command toggles the display between 24- and 43-line
 modes (on an EGA) or 25- and 50-line modes (on a VGA).

 With the number of lines increased, you'll be able to see
 more on the screen when you're in the Commander.

   Note:  On some systems, the ANSI.SYS driver (loaded in the
          \config.sys file) will limit DOS's output to the
          first 25 lines of the screen.  If you want to use
          more lines, you can remove ANSI.SYS from
          \config.sys.