how do i darken the selected pixels? (eg move them closer to black).

I have some thin grey lines in a picture but they are not visible when i print out the image. I can select them using the magic wand but i dont know how to make them darker..



There are lots of ways to do this. One option is to adjust the Brightness/Contrast or Hue/Saturation (look under "Adjustments".) Another is to zoom in so you are close enough to click accurately on the one-pixel-wide line and use the paint bucket tool with a darker color.

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I've tried several methods to make a scanned signature look better in Paint.NET, and while I've been able to change the signature's color using the Brightness/Contrast method mentioned previously, I still wasn't satisfied with the image. After some experimentation, I found that "thickening" the signature lines is very effective and can be done with the following steps:

  • Use the "magic wand" (or your preferred selection method) to select the outline
  • Click "Layers"->"Duplicate Layer"
  • Your newly created layer will be selected, so click "Layers"->"Rotate / Zoom"
  • Increase the zoom level from 1.0 upwards until the outline is at the desired thickness. Somewhere between 1.02 and 1.05 usually works for me.
  • After clicking "OK", click "Layers"->"Merge Layer Down"
  • For added thickness/sharpness, use the "Effects"->"Selection"->"Outline Selection" tool. Note that this took is part of a plug-in pack.
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