The specific steps of setting the background style for Ppt are as follows:

Tools/materials: ASUS A456U and win 10 system.

1. Open the PPT file and click the View tab in any slide.

2. Click the Master tab in the pop-up drop-down menu, and then click Slide Master.

3. Click the "Background Style" tab in the pop-up drop-down menu.

4. Click "Format Background" in the pop-up drop-down menu.

5. Select the desired background style in the pop-up dialog box, and click OK to finish the setting.