1. First make a new 3 by 3 pixle with transparent background 2. Zoom the image to the size 1600%(full), now you should have something that looks like this: 3. Now pull out your "pencil tool" and set the "master diameter (right click) to 1px. 4. Just click once on the middle of the image and now it looks like this: 5. Now you've created the pattern, you have to save it, now go to "edit" > "define pattern" and save it as any name you want, i named mines "dots". 6. To apply the pattern on an image, go to "edit" > "fill", choose the pattern you've made and select the "mode" and "opacity". And thats all, Enjoy!!!