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In Paint.net, is it possible to select a quadrilateral area with diagonal faces? How?

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  • 1
    You can't split pixels if that's what your asking, a diagonal line will cut through pixels, so it will give you a saw-tooth pattern
    – Ivo Flipse
    Feb 9, 2010 at 9:56
  • I'm not a Paint.NET user, but as food for thought I'll tell you what I'd do in Photoshop. I'd select a normal (parallel to axis) rectangle, switch to quickmask mode, rotate the quickmask layer 45deg, and switch back.
    – Stefan Monov
    Feb 9, 2010 at 11:24

3 Answers 3

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You can do a rectangular selection and then rotate the selection box.

  1. Activate the Select tool, typically shortcut key s.
  2. Draw an approximate (or random) sized square.
  3. Activate the Move Selection tool, typically shortcut key mm.
    • This is a different tool than the Move Selected Pixels.
  4. You should be now able move your mouse until you see ability to rotate your selection box (not the pixels). You can also move the selection box, adjust its size.
    • Tip: Holding shift key while rotating will jump to common rotation angles.

paint.net 5.0.2 visual showcase of tools to rotate selection

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  • right and left MB both do selections... Needs more detailed explanation. -1
    – Matas Vaitkevicius
    May 9, 2019 at 8:14
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You can create a new layer. Use Line tool to draw a closed area. Then use the Magic Wand tool to create the selection. Switch to your previous layer and you have your selection

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It's not something that's built in, but there might be a plugin that will do what you want (or a good approximation - see Ivo's comment).

The plugins can be found on the Paint.NET forum plugins board

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