How do you change anything that isn't transparent to black in gimp?

Question

I have an Image, and I want to change anything that isn't transparent into black.

Billy Kerr · Accepted Answer · 2021-01-11 01:02:50Z

Select black as the foreground colour (or press D to set default colours: black foreground, and white background)
Make sure you have the correct layer select in the Layers panel, then select Lock alpha channel

Obviously, once you've finished, unlock the alpha channel if you want to edit the transparent areas again.

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