hi althalus,
thank you for your help and reply.
for the reason i'm used to this behavior in debian,
i included your "bind \\ quit" in my .screenrc and everything works as expected.
i like this command and i see there no problem, because i'm asked for a confirmation before the windows get closed.
i think this vertical split is handy:
it provides almost something like a windows-manager-environment in a single terminal.
i would really appreciate, if you want to consider that patch in your next packaging
thank you for your commitment to tinycore.