Beginners Tip! Box Tool.

Beginners Tip! Box tool (rectangle, square) edges can't be edited. That is, no deflection (curve) inward or outward. Use line or polygon tool instead. If you want to curve the corners, use curve fillet tool. Chamfer corners, use chamfer tool. You will find that these are very useful tools and can be used in ways you have not thought of yet. Hint! Not just limited to lines or shapes.