You can scroll back for a bit in screen. C-a [ (or, apparently, C-a Esc) goes into copy mode, in which you can scroll using the arrow keys. Exit copy mode by wa

You can scroll back for a bit in screen. C-a [ (or, apparently, C-a Esc) goes into copy mode, in which you can scroll using the arrow keys. Exit copy mode by wailing on Esc until it gives up. Be careful not to leave a screen sitting in copy mode and expect the process in the screen to keep running.