Take a photo with camera: Tap on the white circle to take a photo then try the different camera settings in the top and bottom tool bars

Take a video: tap on Video in the bottom bar and see settings, tap the red circle to start then tap the red square to finish. Watch back by opening the Photos app

Scan a QR code: Hold the camera over a QR code (Quick Reader) to open a link to a website

Scan a document: Open Notes and select a note or create a new one. Tap the Camera button, then tap Scan Documents. Place your document on a table and hold the camera over it. If the app is in Auto mode, it will scan automatically. Tap Save and find the document in Notes

Change Camera Settings: Open main iPhone Settings ❯ Camera and make useful changes

Other Camera app task: advanced