To enable settings the Dock must to be relaunched from Cocktail.
Enable transparent icons for hidden applications:
When enabled a hidden application's Dock icon will become transparent. This setting provides a visual presentation of a applications state.
Enable Single Application mode:
Enabling Single Application mode causes all of the other applications that are running, to hide from the screen when you click the Dock icon of the application you want to isolate.
Disable Dock icon bouncing for alerts:
When enabled applications will no longer bounce to notify of an event going on in that application.
Show only running applications:
When enabled, only the icons of the open applications are displayed.
Lock Dock content:
When enabled you can not add, remove or re-order the Dock.
Lock icon size:
When enabled you can not resize icons in the Dock.
Enable mouse over on stacks:
When enabled a mouse over effect will appear when hovering over a stack.
Auto-show delay:
Set the time it takes to show the Dock when Dock hiding is enabled and a cursor is hovered near the Dock location. This setting doesn’t change the animation speed of the Dock sliding in and out itself. You will need to restart the computer in order for changes to take effect.
Add recent / favorite items to the dock:
Once the enabled you can select which stack you want to use by right clicking on the new dock icon. You can select recent applications, recent document, recent servers, favorite volumes or favorite items. If you have disabled recent items in System Preferences the Dock item will not display any items. You can chose to add the item either to the left or right side of the Dock. The left side is where applications live and the right side where documents are (assuming the Dock is at the bottom of the screen).
Add spacer to the dock:
This adds an empty item to the Dock.