after you reattach a `ctrl-a F` runs the "fit" command to resize the current window. if you reattach using the `-A` option it should resize all windows when you reattach. Are there others still attached to the screen session when you are attaching? For instance, are you having to use -x to reattach instead of -r? you can detach others when you reattach with "screen -D -r" instead of "screen -x", and I'd expect this to automatically refit windows.