Working with selections : Creating custom patterns from selections
 
Creating custom patterns from selections
You can convert a selection into a seamless custom pattern, which you can use for painting, adding text, or creating Web page backgrounds.
To create a custom pattern
Edit workspace 
1 Make a selection.
2 Choose Effects Image Effects Seamless Tiling.
The Seamless Tiling dialog box appears.
3 Choose an option from the Tiling Method group box.
4 Choose an option from the Direction group box.
If you choose Bidirectional, you need to choose a setting from the Corner Style group box.
5 Modify any of the settings in the Settings group box.
6 Click OK.