Final answer:
To resize a shape nonproportionally, you should hold the Alt key while resizing.
Step-by-step explanation:
To resize a shape nonproportionally, you should hold the Alt key while resizing. Holding the Alt key allows you to adjust the height and width of the shape independently, allowing for nonproportional resizing.
When you hold the Alt key and drag one of the edges or corners of a shape, the shape will be resized from that edge or corner without maintaining its original proportions.
For example, if you have a rectangle and you want to make it taller but not wider, holding the Alt key while dragging the bottom edge of the rectangle will resize it nonproportionally.