The zoom feature of calla boasts extremely magnification. I had taken the moon surface some time ago. This button is a self-mode switching button. Easy? Turn the dial next to the shutter. You can adjust the focus. And touch the screen to focus on the point. Pressing the lightning button changes the flash mode. The pictures taken with CALLA look great with Flash. Please take a picture with flash. Try pressing the top right button to see the photos you have taken. You can check it in the feed.