A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Hey TWHH,
I'm assuming you're performing the three-finger drag and not a two-finger drag. I'm not aware of a two-finger drag and when I tested on my machine, dragging two fingers only scrolls the page.
What version of Office for Mac 2011 are you using? You can check in PowerPoint by choosing PowerPoint > About PowerPoint from the menu bar. The latest version is 14.1.3.
If you're not running 14.1.3, you can get up-to-date by choosing Help > Check for Updates.