Do any of the following:

If needed, adjust settings such as flash or photo size.
Frame your subject:

To set focus location, tap the screen then drag the focus ring.

To take the photo, do one of the following:





To review your photos and videos, tap thumbnail at bottom right. Then:





To take the photo, do one of the following:





Capture photos from two different perspectives at the same time. For example, take a selfie while shooting with the main camera.

Review the preview and adjust as needed:







You can also:
If you're having issues, try these troubleshooting steps.