Please follow the steps mentioned in attached screenshot given below:
STEP-1: Please log in using your credentials.
STEP-2: Click on the settings icon on the top of the dashboard.
STEP-3: Then click on the security settings, choose the button for Activate 2FA.
STEP-4: Here you can scan your QR code & submit your verification code and click on Activate. then choose options(Save the profile, Trade function & Login) for activating your 2FA then click on the SUBMIT button.