Behaviour during "Show Windows" Exposé
The selected setting of this option determines how this dock behaves when Exposé is activated in "All Windows" or "Application Windows" mode.
You can change how and which mode of Exposé is activated in the System Preferences.
Only available under Mac OS X 10.3 or higher.
normal
To make this dock behave like any other window when "Show Windows" Exposé is activated, click this button.
With this setting selected, the "Show Windows" modes of Exposé will hide a floating dock and move a non-floating dock.
hide dock
To hide this dock when "Show Windows" Exposé is activated, no matter whether it is a floating dock or not, click this button.
always move
To always move this dock when "Show Windows" Exposé is activated, no matter whether it is a floating dock or not, click this button.
never move
To never move or hide this dock when "Show Windows" Exposé is activated, click this button.
Behaviour during "Show Desktop" Exposé
The selected setting of this option determines how this dock behaves when Exposé is activated in "Desktop" mode.
You can change how and which mode of Exposé is activated in the System Preferences.
Only available under Mac OS X 10.3 and 10.4.
normal
To make this dock behave like any other window when "Desktop" Exposé is activated, click this button.
With this setting selected, the "Desktop" mode of Exposé will move all docks to the edge of the screen.
never move
To never move this dock to the edge of the screen when "Desktop" Exposé is activated, click this button.
The display of the dock will be completely unaffected by Exposé.
Show in all Spaces
To make this dock appear on all Spaces, check this box.
Only available under Mac OS X 10.5 or higher.
Locking
To prevent further changes to this dock, click the lock button until it shows a closed padlock icon. To make changes, click it again until it shows an open padlock icon.
Navigation
To switch to the Dock Options windows for the other docks, click the arrow buttons to navigate between them.