How to insert a WaterMark in PowerPoint presentation: confused:

http://office.microsoft.com/en-us/powerpoint/HA010797741033.aspx
Add a PowerPoint Watermark to Your Presentation (http://www.guidesandtutorials.com/powerpoint-watermark.html)

You learn somethine new every day -- water mark not level to fill a water glass

Just kidding -- Need Karma has the right answer -- my search confirms it #1

You can also watermark images, inside your presentations with one of the software like this: Easy Photo Watermark Maker - Reviews and free Easy Photo Watermark Maker downloads at Download.com (http://www.download.com/Easy-Photo-Watermark-Maker/3000-2192_4-10764449.html?tag=lst-7)