There's also a nifty little utility to help you move around the map quickly... click on it and it brings up a mini-map with a black square showing the portion of the mapboard currently on your screen. As you click in the mini-map, the main mapboard moves instantly to follow where you've moved to.
This is going to help heaps when you're wondering about LOS possibilities, or trying to avoid getting so caught up in the little picture that you find it difficult to see what is going on in your "peripheral vision", so to speak.