i know how to shrink dosbox, but how to i expand it or make it fullscreen again?

Are you asking about a temporary change with a keypress or a default on start one?

Temporary change should be ALT-Enter

For default changes, check this out:

http://www.dosgamers.com/dos/dosbox-dos-emulator/screen-resolution

Hope this helps

thx for the info

Not a problem. Hope it solves your issue.

ah.. i thought the username was gay wind.. :-/