> iMovie wants 4:3. It doesn't have to be 640x480. > > This lets you design your art in Photoshop with the > same aspect that you'll see it on your TV. 720x540 is the 4:3 dimension you'll want to work with in Photoshop. This will allow iMovie to scale the vertical dimension to 480 and keep your graphics looking as sharp as possible. Scaling up (from 640 -> 720) is always less desirable than scaling down (540 -> 480). - Mark