When you select an item or a spell with an area affect and you are aiming, move your cursor around - as you go, you will see the affected areas shown in red - so you can tell exactly who's going to be affected and adjust accordingly before you fire. And you're not restricted to aiming at a specific individual - you can point the cursor anywhere in the room and know who will be hit.
[ 10-03-2001: Message edited by: Rhea ]