The specific method is as follows:
1. Press Win to open the start menu, click all programs, drag the scroll bar on the right to find Pinyin Z, and click Photo Tile to open the program.
2. After opening the photo tile, click the bottom _ (circle outside the plus sign).
3. After opening the dialog box, click to select the picture you like, and then click the "Open" button at the bottom.
4. The following is the final rendering:
Win 10 system start menu has its own photos as the background, which can make the interface look more personalized. Come and have a try if you are interested.