I want my dosbox window to be a window, not fullscreen, to make alt-tabbing easier; but I want to know how to *make* it bigger. all the guides I can find speak of doing so from dosbox, making a new link, not from GOG.

how would I do this?

ALT-enter will switch the dosbox screen to full screen.

sorry, I should have clarified, I specifically do not want fullscreen.

however

I did figure out how to do it.

go to your starflight folder (or SF2 folder) and click on dosboxSF1.config (or SF2) and
edit "fullscreen=true" to be "fullscreen=false"
then
edit "windowresolution=original" to be "windowresolution=1280x960" or whatever other number combo you wish (640x480, for example)