If your standard PowerPoint background has you (and your audience) yawning, consider adding a little pizzazz with background images from the Office Online Clip Art & Media collection.
1. First, check out these background images on Office Online and download one you like – we have lots of new illustrations in styles ranging from funky and modern to slick and professional.
2. Then, add the picture as a background:
To select multiple slides, click a slide, and then press and hold CTRL while you click the other slides.
Notes
Let me know if you have any trouble with these steps – if you do others might as well and I can update them super quick with your suggestions.
--Sheila