How to add a border in PowerPoint using shapes 1. Open PowerPoint on your Mac or PC and open the slideshow you want to edit. 2. Navigate to the "Insert" tab at the top of the screen.

4. Highlight your chosen image and click Insert. 5. If you don’t like the selected image, click the Undo icon, press Ctrl+Z, or click Reset Background at the bottom of the Format Background submenu.