A student here accidentally changed his full screen background color (from 75% grey). How? How to reset it?
Some digging on google led to the solution..
Photoshop TIP:
Changing the Matte Color. You can change the neutral gray background color that surrounds your image when you’re in full-screen mode or when you expand the document window larger than the image itself. Just pick a foreground color, and then Shift-click on the background with the Paint Bucket tool (it’s in the Gradient tool’s popout menu). At first glance, this is nothing more than a good trick to play on your colleagues.
However, it’s also a good way to preview how an image will look if you’re going to place it on a colored background.




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