Selecting Your Entire Image in Your Photo Editor
If you want to change your entire digital photo, most programs allow you to select all pixels in your picture. You can select (or deselect) the whole image in a number of ways, depending on what program you’re using:
Use a tool. In some entry-level photo editors, you simply click the image with a particular selection tool, usually called a Pick tool or Arrow tool. Click once to select; click again to deselect.
Select a menu command. Look on the menu that holds the selection commands for a Select All command or something similar. You can probably also find a Select None or Deselect command that gets rid of an existing selection outline.
Press the keyboard shortcut. For the quickest route to whole-image selection, use the universal keyboard shortcut: Ctrl+A in Windows and command+A on a Mac.
Some programs also provide a shortcut for deselecting everything. In Elements, press Ctrl+D (Windows) or command+D (Mac).