Using the Trim Command in Photoshop

The fabulous Trim trims away transparent or solid-colored areas around your image. Choose Image➪Trim, and a dialog box appears. Select Transparent Pixels (for layered images), Top Left Pixel Color, or Bottom Right Pixel Color as a basis for the trim. Next, instruct Photoshop to trim away the Top, Bottom, Left, or Right side(s) from the image. This command works great for quickly eliminating black-and-white borders around images.