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.
6. Now you are able to accept payments using PayPal. Your customers can pay both with their credit cards without signing in to PayPal or with their PayPal accounts.