1. Drag in the Stack.
2. Add your PayPal account ID and Currency.
3. Change the payment type text, return URL after completion of payment and the button text.
4. The rest are optional. you can enable or disable amounts in a dropdown, add a security message and credit card logos for reassurance, change the colours of the stack and loads more.
Publish and then send your clients to it and you'll instantly look more pro and get paid. Good times.