A quick way to change how an object looks is to apply an object style to it. Every template includes object styles—combinations of colors, borders, shadows, and other attributes—that are designed to look good with the template.
After applying a style to an object, you can further change the look of the object by choosing your own options for border, color, and shadow.
Tap an image, shape, text box, line, arrow, or video, then tap
.
To apply an object style to a table, see Change table gridlines and colors. To apply an object style to a chart, see Change the look of a chart.

Tap a style to apply it.
To further modify how the object looks, tap Style Options and use the controls to make changes.