If "MB3 drag scrolling" is enabled, you can scroll the contents of any window which has either vertical or horizontal scroll bars, simply by holding down mouse button 3 and dragging the mouse while mouse button 3 is down. This has the advantage that you don't have to move the mouse to the scroll bars first and is really handy once you get used to it. This should work with any PM window, theoretically.

Note: This setting is independent of the "AutoScroll" setting for mouse-button-3 clicks above. You can have AutoScroll enabled and drag-scrolling disabled, and vice versa.

If drag scrolling is enabled, the other settings apply: