01-16-2020, 10:09 AM
Usually, when this happens (with any app) I move the window (Alt+drag) until I get a border (top or bottom) and then I click on the border to resize the window.
Otherwise you quit Gimp, edit the sessionrc file in the Gimp profile, find the window, and tweak the position/size.
Otherwise you quit Gimp, edit the sessionrc file in the Gimp profile, find the window, and tweak the position/size.