How to add a backboard to ppt slides?

1. First open any PPT document, click View in the toolbar, and then you can see the "slide master" option in the master view below;

2. Click the slide master to edit the master and all slides. If you want to insert the basemap uniformly, click Insert-Picture.

3. Find any picture you want to insert locally on the computer, and then you can see from the slide thumbnails on the left that all the slides are inserted with a unified background picture, as shown in the figure. ...

However, after all, the base map is only used as a background map. Insertion will block the following text. We also need to select the picture and click the right mouse button to select "Place at the bottom";

5. If we only want to insert pictures in a specific slide, we can't do this on the master, but choose other pages and choose Insert-Picture.