Hello All - actually, I notice this as a bug for both the Reveal and Hide functions, anywhere on a map. With either function enabled, the click>hold>drag function works to create a rectangular area, but on the mouse-release event, the rectangle stays on the screen and does not have any effect on the Fog of War. The next action on the map (click, drag, etc) makes the shape disappear but the FOW is not affected. Hope this helps...