less

Do not clear the screen on exit

       -X or --no-init
	      Disables sending the termcap initialization and deinitialization
	      strings to the terminal.	This is  sometimes  desirable  if  the
	      deinitialization	string does something unnecessary, like clear-
	      ing the screen.

Usually used with -F for direct output in one screen, and -R to show colors.

       -F or --quit-if-one-screen
	      Causes less to automatically exit if the entire file can be
	      displayed on the first screen.