If cmd is not an empty string, screen will not use the terminal capabilities
po/pffor printing if it detects an ansi print sequence
ESC [ 5 i, but pipe the output into cmd. This should normally be a command like ‘lpr’ or ‘cat > /tmp/scrprint’.
Printcmdwithout an argument displays the current setting. The ansi sequence
ESC \ends printing and closes the pipe.
Warning: Be careful with this command! If other user have write access to your terminal, they will be able to fire off print commands.