When you first start using The Gimp, it may look very different to other
graphics programs that you have been using. This can make it seem hard to
do quite simple tasks. On this page, I will show you how to do the 'easy
stuff' - things that you probably found very simple in another program, and that
you will soon see are also very simple in 'The Gimp'.
Right Click Choose Image>Scale Image
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The Difference between Zooming and Resizing
When you zoom in and out on your image, you are not changing the
actual size of your image, you are just changing the way you look at
it. (Like using a magnifying glass)
When you resize an image, you are changing the number of pixels
of information in it, so the actual file size will become smaller if
you are making it a smaller size. When you resize to make it
larger, The Gimp has to guess what information to fill in for the
missing pixels. It may not always be what you expect.
If you just need to make your file size smaller but not the
actual image size (eg for the web), you can compress your
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To Rotate, right click and choose: Image>Transforms>Rotate

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Download and save the image
rock.jpg
The first thing that you will notice is that it needs
rotating. Rotate it. Save it.
Next resize it, so that it is only 500 pixels high.
Keep the width in proportion. Save it as rock1.jpg Check the
file size and make sure that it is less than 60 Kb, so that it is small enough
to be emailed.
Now reopen the original image and crop it, so that only
the rock is in the picture. Save it as rock2.jpg
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