This is a link to the GCFLearnfree series of lessons on Powerpoint: PowerPoint 2016 . The initial lessons in the series review techniques for opening, saving and printing documents that you learned for MS-Word. In the Topics list below, you can find links directly to basic material specific to using Powerpoint. Feel free to explore additional topics if you wish.
You can find additional material about Powerpoint at the Microsoft support site at Office.com.

Topics
Slide Basics
Text Basics
Applying Themes
Applying Transitions