In order to customize a shape, Kelli should first add a basic shape and select it. After that, she needs to access the format tab where she can find the option to edit the selected shape. She can modify the selected shape or change it to a free-form according to her needs.
Step-by-step explanation:
Microsoft PowerPoint provides an easy way for customizing the shapes according to the needs of the user.
Although PowerPoint provides many basic shapes that suit the need of most of the users but in exceptional cases, changes are always welcome. So in order to customize a shape, she should follow the steps which has been explained above.