Choose Save Patterns from a Pattern pop‑up
palette menu.
Choose a location for the pattern library, enter a file
name, and click Save.
You can save the library anywhere. However, if you place
the library file in the Presets/Patterns folder in the default location,
the library name will appear at the bottom of the Pattern pop‑up
palette menus after you restart Photoshop.
Choose Reset Patterns from a Pattern
pop‑up palette menu. You can either replace the current list or
append the default library to the current list.
If you receive a Pattern Stamp tool preset
that uses an undefined pattern, or if you erase the preset you’re
using by resetting or replacing the pattern library, choose New
Pattern from the Pattern pop‑up palette menu to redefine the pattern.