undoing change. See also history state
Brush tool operation, 253
crop operation, 85
filter operation, 224
keyboard shortcut edit, 27
layer deletion, 167
Liquify operation, 245
operation, last, 289–290
Pencil tool operation, 253
printing, after, 290
Revert command, using, 53, 290
sizing image, 78–79
type operation, 358, 366
unit of measure, changing, 59, 79
Unsharp Mask filter, 226–229
URL (Uniform Resource Locator)
image map, attaching to, 415, 417
slice, attaching to, 411, 413