1. Create a new canvas with a width of 30 cm, a height of 15 cm, a resolution of 72, and fill it with white.
2. Drag the background material into the canvas and adjust the size appropriately. The effect is as shown in the figure.
3. Drag the character into the canvas and adjust the position and size appropriately.
4. Subtract the excess background, and the effect is as shown in the figure.
