Like a hotkey? I don't think OD supports that. The only thing you can do is set up a hotspot, so when you put your mouse in that hotspot, the dock comes up. My tabbed docks come up over a maximized window when I mouse over the area that they are in. I don't have hotspots setup so I have to be really close to them, but with a hotspot, you just have to be in the general area.
