Creating a New Pattern in Photoshop

You can create your own pattern, basing it on an existing image or on one you create yourself. Select a small portion of an image to build an abstract pattern, or use a recognizable object to define that object as a pattern stamp. You can use anything from a logo to your signature as a pattern.
To create your own pattern, follow these steps:
1. Open the image that contains the area you want to use as a pattern, or create an image from scratch.
2. Make any modifications to the image to produce the exact pattern that you want.
3. Use the Rectangular Marquee tool to select the area you want converted into a pattern.
You must use a rectangular selection in order to create a pattern. Note that you cannot use a feathered selection of any kind.
4. Choose Edit➪Define Pattern.
The Define Pattern dialog box opens.
5. Enter a name for your pattern in the Define Pattern dialog box.
Your new pattern appears in the Pattern palette for use.