Feel free to download the banner at the bottom of this page if you'd like to use that as well. This is not only good netiquette, but will result in faster response to your site. Click on any thumbnail to see an example page with the pattern applied as a background. Some of the rectangular tilings are simply cropped from our photographs, flipped vertically, then horizontally. With practice, you will discover lots of images that make interesting tilings.
Command click the layer with the image in the upper lefthand corner to select the image.
Using the move tool with the Shift key held down to constrain the motion, drag this copy from the upper left hand corner to the lower left hand corner of the canvas and release. Make sure the bottow row of pixels exactly fills the canvas. Command click the layer with the image in the left side to select the image. Using the move tool with the Shift key held down to constrain the motion, drag this copy from the left side to the right side of the canvas and release. Make sure the right row of pixels exactly fills the canvas.