These settings affect how PayPal's checkout page looks and behaves.
Return URL - this will default to the URL the button is located on. However, you can set a specific page if you wish. Note that PayPal does not seem to like non-SEF Joomla URLs so if you do not use SEF, PayPal will simply return to your home page. If you want to return to a different page, then use SEF and enter the SEF url here.
Cancel return URL - same as the Return URL except used when the user clicks cancel and return to merchant's site on PayPal's checkout page.
Return to merchant button text - this wil change the wording of the return to merchant button displayed after a purchase has been completed.
Instant payment notification URL - ADVANCED USE ONLY. Define a 3rd party IPN URL to use. Using any URL here will break all EzPPb functions that rely on IPN notifications.
Shipping address requirement - This will determine if PayPal will require an address from the user, make it optional, or not require any address.
Prompty payers for an optional note - Adds a note textbox to the checkout page for the customer to make comments to the merchant
Label for optional note field - Define the label for the above optional note textbox
Checkout page style - You can choose a specific page style defined in your PayPal profile.
Logo image URL - Define a URL to an image to use as the logo on PayPal's page. It is recommended that this image is hosted under a secure URL (https)
Header image URL - Define a URL to an image to use as the header of the checkout page. It is recommended that this image is hosted under a secure URL (https)
Below header background color - Set a background color for the checkoutpage below the header. Colors that conflicts with PayPal's error messages will not be allowed and will thus default to white.