Function:
Crop the photo into a circular shape with your fingers.

Instructions:
1. Click on "Cut circle" in the menu
2. Click on the "Load image" button (read / write permission may be required)
3. Choose a photo to crop in a circular shape.
4. Click on the "Cut circle" button
5a. Use one finger to move the circular area in the preview.
5b. Use two fingers to stretch the circle to a different size in the preview.
6. Click on "Save Image" and wait for processing and completion.
7. When finished, you can find a circular photo in the gallery.