Many times, you want to animate several slide objects — rather than select each of them individually and then animate them, you can select them all together as a group and animate them. You may also want to rotate a few shapes placed next to each other to a certain angle — at times like these, you’ll be happy to know that grouping, ungrouping, and regrouping shapes makes it simpler and quicker to do these tasks.
Learn how to group, ungroup, and regroup shapes in PowerPoint 2011 for Mac.

