Show contextual menus on click and hold
To show the contextual menu for a dock item when you click on it and hold down the mouse button for a certain length of time, check this box.
Delay before showing menus
To change the delay before the contextual menus is show, drag this slider.
Show sub-folders in folder contextual menus
To show sub-folders in the folder item contextual menus as hierarchical menus, check this box.
Follow aliases in folder contextual menus
To show sub-folders in the folder item contextual menus for aliases to folders, check this box.
Enable contextual menu plug-ins
To enable plug-ins to appear in the contextual menus for dock items, check this box.