Menu: File Preferences
Mac: Cmd + K
Win: Ctrl + K
Note: Preferences are available on Mac OS X by choosing the application menu (Photoshop Preferences). Apple had instituted new interface guidelines for OS X-native applications, some of which conflict with existing Photoshop shortcuts. To use the OS X-standard shortcuts, enable the preference Use System Shortcut Keys in General Preferences. Enabling the preference changes the following shortcuts:
Accessing Other Preference Panels from the Photoshop General Preferences Panel
In Photoshop 7, "Saving Files" has been renamed "File Handling."
Accessing Other Preference Panels from the ImageReady General Preferences Panel
In Windows, "Plug-Ins & Scratch Disks" is named "Plug-Ins."
Reopen the Last Option Panel Used in Preferences
Menu: Edit Preferences
Mac: Cmd + Option + K
Win: Ctrl + Alt + K