The photographer takes your picture and tags it in his camera to the scan code on the back of the photo card.
Take the card to the camera/photo store and give the card to the CM.
The CM will bring the pictures tagged on the card up on a computer monitor.
You can look at all of the photos.
You are NOT required to buy any if you don't want to.
I have bought photos this way and like I mentioned the cost adds up fast.
With PP+ you order online. The voucher you get in the mail is turned in at the photo/camera store and they give you a special PP+ card.
You can get all ride photos, a character meal photo set and any photos taken by Disney photographers on the PP+ card.
During a 4 day trip it's not uncommon for me to end up with 200 or more photos on the PP+ card. And all it costs is $69.95.
It's a nice way to have all the ride pictures.
Geemo