You can add a border to the image in Microsoft PowerPoint and PowerPoint Online. Add a black, dotted, white frame, etc. using this guide.

How to Add Two Lines to a Powerpoint Chart. "Presenters are usually guilty of including too much data in their on-screen charts," says Garr Reynolds, author of Presentation Zen.

How to do a voiceover on a PowerPoint presentation and add pre-recorded audio to your slides The 48 best PowerPoint keyboard shortcuts for making great presentations quickly and easily ...