Rotate
Rotates the active dock.
If the dock is minimised, it is turned on its side, otherwise the rows and columns are switched round.
Minimise / Maximise
Minimise shrinks the window of the active dock to contain just the dock title.
Maximise returns the active dock to its normal size.
Next Dock / Previous Dock
Selects the next dock in the list.
Hold down Option to select the previous dock.
Show / Hide Paint Tools
Shows and hides the Paint Tools window which lets you draw colours, styles and textures directly onto docks like a simple painting application.
[ list of docks ]
Brings the corresponding dock to the front, showing it if necessary.
Checked if this is the frontmost window.