By displaying for example level 3 or 4 you can see buildings without their roofs blocking the view inside or upper levels. My only gripe with this system is that you have to reset the view level you want after almost every individual soldier action or map scroll because the view seems to reset to level 1 on its own. The orders you can give your soldiers cover just about every conceivable action you might want them to take. Each soldier can run, walk or crawl. They can stand, kneel or be prone.
Soldiers can just shoot or aim a shot.
They can target special weapons like bazookas. Soldiers can throw grenades or place satchel charges. When a soldier's weapon runs out of ammo he must reload it. First aid can be applied to fellow soldiers or a wounded soldier can be carried by a squad mate to safety. Wire can be cut and doors opened or closed.