I give you a working example of how you can crop a image via the GIMP editing software.
As you can see in the video you can have a Fixed Aspect Ratio crop or an Unfixed Aspect Ratio Crop. Note Fixed Aspect Ratio Crops are used when you are printing images such as Posters, Prints etc....
And Unfixed Aspect Ratio crops are often used for on line work such as banners on websites etc...
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Watch video Crop Tool: GIMP a Basic Tool online without registration, duration hours minute second in high quality. This video was added by user UK Highland Photography 23 September 2014, don't forget to share it with your friends and acquaintances, it has been viewed on our site 422 once and liked it like people.