Download Article Download Article The Format Background utility in PowerPoint allows you to select an paradigm from your calculator or online to use as the background for your slide. You tin set this background to multiple slides at once, or employ it to your entire presentation. You can also add effects to the background epitome to requite it a bit of flair. If you lot aren't able to alter the background elements, you may take to edit the slide master. 1 Open your PowerPoint presentation. Yous tin add graphics to the background of whatsoever slide in your PowerPoint presentation. Open the presentation you want to edit in PowerPoint.