You can enable Two-factor authentication on desktop in the following way.

* You cannot enable Two-factor authentication on smartphone app. Use a desktop for setting up.

* Only Teams for a paid plan can use Two-factor authentication.

1. Click “Settings” in the upper right corner and “Your name”.

2. Click “Two-factor authentication” in the menu on the left side and enter your password.

3. Enter “Authentication code” following the steps displayed on the screen and click “Enable”.

4. On completion of enabling Two-factor authentication, keep backup codes displayed on the screen somewhere safe.

5. When Two-factor authentication is enabled, the message is shown on the settings screen that “Two-Factor authentication is enabled in this account.”

* You can disable Two-factor authentication or get backup codes again at any time on the settings page.