Keniu Image is a picture editing software that has many very practical functions. Here are the details about
1. Open the software and select the image you want to import.
2. After importing, click Cutout in the upper right corner.
3. On the left, you can choose the method you want to cut out, and then select the pen to operate on your drawing.
4. Use the "Exclude Pen" to select the unwanted parts, and then click Finish.