once customers get my invoice with the paypal link, if customers click that link, it will open the invoice, then once customers click the "Pay" button, it will only show one option: "Paypal" under the "CHOOSE YOUR MODE OF PAYMENT" section.

some of my customers stop there because they want to pay by credit card. and they don't know once they click the: "PROCEED TO PAYMENT", it will have an option to pay by credit card (without Paypal account).

Suggestion: will be nice that you can put a small line of text under 'PROCEED TO PAYMENT" green button, say: "you can pay by credit card even if you don't have paypal account".

Thanks
James