You can add a border, such as a picture frame or a dotted line, around an image, shape, text box, or video, then modify the border’s thickness, color, and other attributes.
Note: To add or change a border for a chart, see Add a border to a chart.
Tap an image, shape, text box, or video, then tap 
.
To add or change a border for a chart, see Add a border to a chart.
Tap Style, then tap to turn on Border.
To set the border’s style, color, and width, use the controls that appear.