Presentation expert Garr Reynolds says "backgrounds should be simple without lots of perceptible differences among the background image itself since this would interfere with the foreground elements." ...

PowerPoint presentations are ubiquitous in the professional and academic world. A well-designed template can make all the difference in capturing an audience’s attention and conveying information ...

You can change the background of your PowerPoint slides using the "Format Background" feature located in the "Design" tab.