To make the optional PayPal account option appear in your PayPal checkout please follow these instructions
1. Go to your PayPal account (must be a business account)
2. Go to profile, my selling tools
3. Under selling online click on update by website preferences
4. Scroll down to PayPal account optional
5. Tick the box next to on
6. Save preferences.
7. In your admin panel under payment methods choose PayPal standard
