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GIMP, often referred to as "The GIMP", is an open-source image editing and painting program, with approximately the same capabilities as PhotoShop and PaintShop Pro. It is available for Linux, Microsoft Windows, and other platforms.

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When trying to dock a "dockable dialog", you have to grab the tab of the dialog, not the dialog window.



  • Q: How do you paint with transparency?
    • A: Use the "eraser" tool - between the paintbrush and airbrush tools.
  • Q: How do you dock the dockable dialogs (aka toolboxes)?
    • A: Supposedly you can drop toolboxes onto a horizontal bar in the main toolbar, but this doesn't seem to work in some versions of Gimp (the bar may display a popup claiming you can do this, but it doesn't work). Alternatively, you can click on the left-pointing triangle-in-a-box on the right hand side of the main toolbar, which opens a menu that allows (among other things) adding any toolbox to the main toolbar as a tab.
  • Q: How do you fix glowy red eyes in photographs?
    • A: Filters -> Enhance -> Red-eye removal
  • Q: After expanding the canvas (e.g. when making two images adjacent), the new part of the image seems to be undisplayable – anything placed there becomes invisible. How do you make it visible?
    • A: Image → Fit Canvas to Layers
      • Sometimes this doesn't work either. Tentatively, you have to be sure you're working with a layer and not a "floating selection".
    • A: Image → Flatten
      • 2022-11-22: This no longer works; it just reduces the canvas to the size of the first image.
      • There's probably some better way of doing this that doesn't remove the transparent layer, but I haven't figured it out yet. I'm still not entirely sure what's happening here; I just know that flattening the image does fix the problem. --Woozle (talk) 09:40, 23 March 2015 (EDT)


  • How do you draw simple shapes, e.g. a circle? --Woozle 11:09, 14 July 2007 (EDT)


  • /alternatives: due to many issues with GIMP's user interface, there have been several attempts to create a more friendly alternative using the same codebase