The Kodak PhotoCD format (PCD) is used by many photo developers. This format can provide multiple image resolutions in one file.
To set PCD file format preferences:
Choose File > Preferences > File Format Preferences to open the File Format Preferences dialog.
Click the PCD tab.
Choose:
A default resolution setting. For example, 1536 x 1204 pixels.
Ask when loading each file PSP will ask you to pick a default resolution each time you open a PCD file.
Click OK.
Setting General Program Preferences
Resetting Application Preferences
Setting File Format Associations
Setting File Format Preferences
Customizing Toolbars and Menus
Adjusting Monitor Display Options