1. Right-click on the slide.
2. Click on the "Format Background" option.
3. Select on the option "Picture or Texture Fill"
4. Click on the box "File" written in a rectangular box.
5. A new window will open to browse your desired file.
6. Double Click the image you want to be in the background or single-click and then click on open.
7. Your chosen image is now your background of the PowerPoint slide. Now you can duplicate the slides and use them on different layouts.