Tools: Lenovo computer, win 10 system version. The operation is as follows:

1. In the blank space of the desktop, click the right mouse button and select Personalization.

2. In the lower right corner of the "Personalization" interface, there is an icon of a screen saver, click there.

3. In the pop-up screen saver settings dialog box, click the drop-down menu at the screen saver, select the screen saver you want to use, and then click the preview button next to it to have a look in advance.

4. After that, set the waiting time, and then click OK.