Function Reference
— Built-in Function: val = page_screen_output ()
— Built-in Function: old_val = page_screen_output (new_val)

Query or set the internal variable that controls whether output intended for the terminal window that is longer than one page is sent through a pager. This allows you to view one screenful at a time. Some pagers (such as less—see Installation) are also capable of moving backward on the output.