Invoice and appointment booking
It would be super helpful to have a custom invoice page included with the Pro package or even optional. I currently use SquareUp and Paypal. But it would be awesome to just send my customers to the same website they purchase photos from to pay for services. It just seems fragmented when it comes to all the things we need as photographers and a great option for Smugmug to distance itself from the competition. Also an appointment option would be nice to compliment the invoicing.