Screen tips
screen is a unix command that manages few virtual terminals.
Splitting the screen
Start screen with few terminals and use C-a S for splitting the current view. C-a TAB allows moving from one to another view.
So:
C-a S split the screen C-a TAB move to another view
man page: http://www.sunsite.ualberta.ca/Documentation/Gnu/screen-3.9.4/html_chapter/screen_toc.html
Thanks to Gwenn aka demisel.