I once created a transition effect like in the old Indiana Jones flicks, where a line would get drawn on a map to show progression of a trip. It worked great in the past, using a transition between a graphic of the map without the line, and a second graphic with the line inserted. I'm trying to create the same effect in a new travel video. but I can't remember how to do it...Can anyone talk me through my senility and remind me how to create this effect?