- -101.2 How to input fingerprintWhen you enroll and authenticate user fingerprint, do thefollowings to avoid authentication error: Press your finger evenly to maximize the input area. If we saythe weakest push as 0%, and the strongest push as 100%, apply50~70% of force. Make sure that the core of the fingerprint is at the center. Ingeneral, the core of the fingerprint is on the same line as thelunula of the fingernail. So locate the lunula of the fingernail atthe center of the fingerprint input window.The recognition performance of the fingerprint recognitiondevice largely depends on the skill of the user. Follow thefingerprint input method described above to improverecognition performance.