2 Replies
Mike Taylor

Some of the images/clip art available via Microsoft are from third parties and may have unique licensing. Here is an article talking about what uses are prohibited by Microsoft: http://office.microsoft.com/en-us/powerpoint-help/what-uses-of-photos-clip-art-and-font-images-are-prohibited-HP003090087.aspx

As Bruce mentions it's probably a good idea to get some advice if you're not sure.

Otherwise you can download clip art, etc from the Office.com site and insert them just like any other image. (Insert » Picture )