Ok, I think I get what you mean. First of all, Right Click on empty space on your dock and make sure
'Autohide' is unchecked. Then, go to the Options screen, then to the 'Positioning' page, and select the
'Keep on bottom' option and click 'OK'. Now, your dock will no longer hide, and will be visible only on
the desktop. If u want to use it while other apps are open, just move the cursor to the edge where
the dock is as you would normally and the dock will show up. When you move the cursor away, the
dock will go back to the background like u want.