How to Make Powerpoint a Certain Color Start by calculation a photograph to your slide You lot can begin past adding a photo background to your slide or just add whatsoever prototype you want your audition to run across. You tin can make prototype adjustments to the photo in instance you need to modify its brightness, contrast, sharpness, etc. Add a shape to your slide You lot will demand to create a rectangle shape and scale it across the entire slide. In case you're not using the prototype as a groundwork, only scale the shape over the photo borders. Access the format settings Afterward you draw your shape, correct-click on inform