When a layer in GIMP is transparent and there are no opaque pixels behind it, you see a kind of default grid indicating that this part of the image is "transparent", like in the centre here:
Is there a way to change the look of this grid, or are you stuck with the default "light grey/dark grey"? I'm open to solutions even if the functionality has only recently been added in development versions of GIMP.
Best Answer
Edit > Preferences > Display > Transparency >Check style and Check size.