Position the patient and instruct them to remain still during the scan. Hold the iPhone ~1 ft away from the body part with the limb centered on screen.
Tap RECORD to start scanning. Slowly move the iPhone around the limb. Maintain a distance of 6-21 inches and always keep the limb centered on the screen.
After all red pixels have faded away, tap RECORD to finish scanning. Review the scan and save for direct upload to C-Fab.