PowerPoint gives you complete customization over shapes—merging shapes, changing the curvature of a shape’s lines, and even drawing your own. If you want to do the latter, here’s how.
Draw a Shape in PowerPoint
If you can’t find the shape you’re looking for, then you can draw your own. To do this, head over to the “Insert” tab and then click the “Shapes” button.
A drop-down menu will appear. Head over to the “Lines” section and locate the last two options. These options are the freeform shape (left) and scribble (right) tools.
Freeform: Shape
Selecting the freeform shape option lets you draw a shape with straight and curved lines. To draw a straight line, click a point on the slide that you would like to start the line, move your cursor to the endpoint, and then click again.
To draw a curved line, click and drag your cursor.
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Source : How to Draw and Edit a Freeform Shape in Microsoft PowerPoint
