Jan. 9, 2011, 9:27 p.m.
posted by spider
To select none (also known as clearing the selection or deselecting), press Ctrl+D or choose Selections→Select None. You can also clear selections (except when the entire image is selected) by right-clicking anywhere on the image.
Sometimes you may want to select everything but the part of the image that is not selected. This process is known as inverting the selection. To perform it, choose Selections→Invert or press Ctrl+Shift+I.