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The manual just says that you can constrain angles to 15 degrees. That's it. That's a constant.

Might be requesting a new feature actually.

Yes, but if you tell us why you need an arbitrary value, there may be solutions you didn't think about.

Well...I want to just hold Shift and Control and draw a line at increments of usually 22.5 degrees instead of 15, and change the number when I want to. You won't get a faster solution mate

Quick lines on pixel drawings