Two graphics in header: one aligned to left margin; the other aligned to right margin

Thanks again, Charles. I ended up designing a single image that combined both graphics. It required some trial and error that wouldn't have been necessary if I had been able to position the graphics independently in Word. I am a little surprised at Word's lack of sophistication in this regard, though I spend my time with Photoshop and Premiere so my expectations are probably a little too high.