Cropping
Use the left mouse button to outline the area (selection), click on the Edit menu, then Crop.
The area outside the outline will be thrown away, only the inside will be left.
Use this to eliminate unwanted space (usually blank space) from an image. It can also center a badly composed photo.
Resizing
Click on the Image Menu, then Resize/Resample. A dialog allows you to choose the new size for the image;
some Resample filter can be used if you are enlarging the image.
There are several built in choices, or you can type over the old numbers. The first number is width,
the second height, both in pixels. You might leave the Preserve aspect ratio box checked (type in one number,
and the other will be calculated for you).
Resampling an image often improves its quality, especially when enlarging it. Enlarging without resampling can result in a blurry image.
Click OK to resize the image.
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