screen -S name “Launch new screen session”

screen -list “List screen sessions”

screen -r name “Attach to screen”

Ctrl+a, ? Show built in help
Ctrl+a, c Create a new screen
Ctrl+a, Ctrl+a Cycle through screens (just hold Ctrl down, type aa)
Ctrl+a, n Cycle through screens (Next screen)
Ctrl+a, Ctrl+n Another cycle through screens
Ctrl+a, S Split the screen (note the capital S)
Ctrl+a, X Close the split screen you are currently in (note capital X)
Ctrl+a, tab Switch between split screens
Ctrl+a, d Detach from screen session
Ctrl+a, [ Start copy (see below)
Ctrl+a, ] Paste (see below)

from http://www.fprimex.com/linux/screen.html