GIMP/Editing
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[edit] Image Operations
Image operations not offered in the toolbox are accessed by right-clicking on the image. In Gimp 2.0, there is also an option to display this menu at the top of the screen. (This option is now default)
Right-click on the image to access the menus. For example, Right-click, File, Save is used to save the image. PNG or JPEG formats are available for use on Wikipedia. To decrease a JPEG's filesize, adjust the Quality slider when you save.
Often, it's useful to get info on an image you're editing. To do this, right-click on the image to bring up the menu, and then choose Image > Image Properties, or hit Alt-Enter. The first three properties are very important for printing: Pixel Dimensions, Print Size, and Resolution.
Image > Canvas size is used to adjust the size of image dimensions, but does not attempt to scale the image.
Image > Scale image is used to change the size of the image, for example to create thumbnail images.
To remove a section of image, just select it (using one of the select tools) and press Control-K ("kill", same as using Edit > Clear). This will either erase the selection to the background colour, or to transparency if the image supports it.
