1. Go to the “Restaurant” → “Payment types” → Turn “Online payments” on → “PayPal”.
2. Sign up on the developer.paypal.com and go to “My Apps & Credentials”.
   Create an application in “Live” mode – press “Live” and then enter the App name.
   After the PayPal account activation, you will have access to Live API Keys.
   How to configure PayPal.
3. Copy live API keys: Paypal client id and Paypal secret key.
4. Paste the API keys in the appropriate fields in the UpMenu panel.
5. Save your changes.