Beyond being just a program to create slides, PowerPoint is also a great illustration program with tools and options that rival top end graphic programs. Yes, you have learned how you can use readymade shapes in PowerPoint to place rectangles, circles, and hundreds of other shapes. However, PowerPoint also has the ability to create shapes from scratch by drawing them. These drawing tools are essentially the Line shapes that can be found within the Shapes gallery. This introductory tutorial shows you how to draw a simple line on the slide.
Learn how to draw a line in PowerPoint 2016 for Windows.

