PowerPoint’s fill, line, and effect attributes enable you to customize the look of shapes and other slide objects in your presentation. However, it may take ages to get that perfect color combination and even after spending so much time, the final look may not match the Theme of your presentation. Shape Styles is an awesome option to overcome this problem. Shape Styles are a collection of prebuilt styles housed within a gallery of the same name. These styles are all Theme-specific. What does this mean? It means that if a presentation’s Theme changes, you’ll end up with new Shape Styles.