To make an image transparent in PowerPoint, you have to change the opacity of the image - and you can do it for the whole image or a part.

You can use Illustrator to create high quality images for your presentation. You may also have other images that you would like to convert to high quality in Illustrator then place in your PowerPoint.

If you're accustomed to using the "magic wand" tool to make parts of pictures transparent in Microsoft Office applications, you'll need to rearrange your workflow in Microsoft PowerPoint for Mac 2011.

If You’re Using Images In PowerPoint Presentations, You’re Doing It Wrong. Here’s What to Use Instead When a picture isn’t worth a thousand words.

If you insert a lot of pictures into PowerPoint slides, you're going to love the new layout placeholders in PowerPoint 2007 and later.