As a long-time Photoshop user, when I work in Elements, one commmand I miss a lot is the Trim command. This command removes excess blank image area from around an image. This can be either a solid color or transparent background area.
The Trim Action is compatible with Photoshop Elements 6 and Photoshop Elements 7. It has not been tested with earlier versions. The Action is free for your own use, but you may not distribute it. You may share the action by referring others to this page.
Installation instructions can be found on the next page.