2. Let's choose a simple rectangle with rounded corners to make a nine-square grid.
3. Then copy this rounded rectangle and arrange it.
4. After the arrangement is completed, select these nine rounded rectangles.
5. Right-click and select a combination. After selecting the nine rectangles under the picture in the fourth step, there is a line of small processing tools on them.
6. Nine rounded rectangles become a big whole.
7. Select Fill in the drawing tool and select Local Picture Fill.
8. Add up the pictures we need to deal with, thus forming a nine-square grid.