Please follow the steps mentioned in attached screenshot given below:
STEPS-1: Please login using your credentials.
STEPS-2: Click on the settings icon on the top of the dashboard.
STEPS-3: Then click on the security settings, choose the button for Activate 2FA.
STEPS-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 SUBMIT button.