Creating shapes on notes in OneNote
With OneNote, you can insert shapes, like a circle, triangle, or rectangle, or even draw shapes with your finger, pen, or mouse, and OneNote will automatically clean them up for you.
Insert a shape
Select Draw > Shapes.
Choose a basic shape, like an Oval, click anywhere in your notebook, and then drag to create the shape.
Draw a shape on a touch screen
Tap Draw with Mouse or Touch.
Tap Ink to Shape.
Draw a shape. Your hand-drawn shapes automatically turn into shapes with straight lines and clean corners.
When you're done drawing, tap Select Objects or Type Text.