C-a Wwidth [-w|-d] [cols [lines]]
Toggle the window width between 80 and 132 columns or set it to cols
columns if an argument is specified. This requires a capable terminal and
the termcap entries “Z0” and “Z1”. See the
termcap command for more information. You can also
specify a new height if you want to change both values. The -w option
tells screen to leave the display size unchanged and just set the window
size, -d vice versa.
None yet.