function:
Crop the photo into circles with your fingers.
procedure:
1. Click "Cut photo" in the menu
2. Click the "Load Image" button (read/write permissions may be required)
3. Select the photo you want to crop into a circle.
4. Click the "Cut Photo" button
5a. Use one finger to move the circular area in the preview.
5b. Use two fingers to stretch the circle to different sizes in the preview.
6. Click Save Image and wait for the process and completion.
7. When complete, you will see a circular photo in the gallery.