The Shape gallery in PowerPoint contains an assortment of 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. Line drawing tools let you create your own shapes — these can be both open and closed. These line drawing tools are Freeform Line, Curve, and Scribble. In addition, you can convert any closed shape to an open shape and vice versa, as you will learn in this tutorial.