100 Manipulating Images
Changing canvas size
Changing the canvas size just involves adding or taking away pixels around the
edges of the image. It's like adding to the neutral border around a mounted
photo, or taking a pair of scissors and cropping the photo to a smaller size. In
either case, the remaining image pixels are undisturbed so there's no distortion.
You will change the canvas size when:
• you want to add a border to your image (without changing the size of
the image itself).
• you crop an image.
There are several ways of changing the image's native canvas size. You can use
the Crop Tool (see Cropping an image on p. 104) or the Crop to
Selection (p. 108) command. For more accurate canvas resizing (both
enlargements or reductions), the Canvas Size dialog that lets you specify where
pixels should be added or subtracted.
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