Equipment: Apple notebook

System: win 10

Software: ppt20 19

1. First turn on the computer, open a ppt document, and click View.

2. Then click the slide master.

3. Then click on the first slide and click on the theme.

4. Then click to select a theme option.

5. Then click the background style, and click Select the background style.

6. The result is as shown in the figure, so the full text is decorated with composite templates.