The Shapes gallery in PowerPoint consist various shapes, both open and closed. Most of the shapes in this gallery are closed shapes (rectangle, ellipse, and triangle are some of the closed shapes). There are also a few open shapes such as the straight point to point line. Some other tools let you create both open and closed shapes — these are the Freeform Line, Curve, and Scribble tools. In addition, you can convert any closed shape to an open shape and vice versa, as you will learn in this tutorial.