How to Make a Photoshop Pattern
1. Open a new canvas and create your pattern. Start by just drawing, copying, or adding the images you want in your pattern. The size of the canvas will be the size of each repeating piece of the pattern later on, so remember this as you're working.
2. Flatten the image if you have multiple layers.Depending on your workflow and pattern, you may end up with multiple layers.
3. Offset your pattern using the Filters menu. In the top bar, click on "Filters"--> Öther"--> Öffset". This will slide the Pattern slightly, making it easier to repeat perfectly.
4. Offset the pattern again, this time focusing on the Horizontal Offset.Again, use "Filters"-->Öther"-->Öffset" to pull up the appropriate menu.
5. Fill in any gaps created in your pattern by the offsetting. When the filter is put into effect, it moves some some of your pattern over. You can, however, use copy and paste or create new drawings to fill in the small spaces if you desire.
6. Offset the image one more time, focusing on the Vertical Offset, if the four corners are not yet meeting.Remember, this pattern wants to repeat perfectly,so the each side should be balanced with other.
7. Save your new pattern to put it to use.Click on Ëdit"-->"Define Pattern". This saves your pattern in the pattern box. You can choose a new name, then hit ÖK"to save the pattern.
8.Test your pattern with Ëdit"-->"Fill."Open up a new canvas, one at least 3-4 times bigger than your pattern. To use the pattern, select "Fill"from the Edit menu, then choose "Pattern"from the use box. You can then choose your pattern from the Custom Pattern Menu.
Source: wikiHow
