GIMP Version: 2.8.14
Operating System: Windows
OS Version: windows 10 64 bit
GIMP Experience: New User

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Hey guys!

I have a question about trimming or sharpening or smoothing, I don't really know the correct terminology actually.

The basic question is thus; I have say, 5 lines that I want 'smoothed', i.e. take the not exactly correct colors from the borders of the line.

Yeah, I'm not really making sense here...maybe this picture will help:


I'm trying to get rid of the pixels that are close to black, but not black, to make the lines look sharper.

take a look here https://www.gimp.org/tutorials/Creating_Icons/
And if this does not work use a Smudge tool....

I'll take a look, thanks for the reply!