Ok I have on track one a video of Hitler screaming out to troops. Then on track two
I have a moving map of the world. I have one problem...I want the map to water mark the troops but not Hitler. I want Hitler to be fully solid.
The effect can be achieved by using VV's masking tools, the mask generator plugin on the event itself or by using the Parent/Child mask with the globe footage on track three.The trick is to isolate the stuff you want out of the picture so the other track is visible.
I don't know what you mean by 'watermarking' though. Do you want the troops to be marching on the spinning globe like in the old newsreels?
Change the opacity of one or both tracks. Simple way, move your cursor over the very top of a video track hover a second, cursor should change to a hand with a finger pointing plus a double headed arrow. Click at extreme top of track, holding down left mouse button drag the blue line you should now see downward.