Also see these articles
Creating Collections / Packages
Collages & Albums Using Collections
Collection Options
I will assign products to the package
This option means you are going to add products from your product
base and assign the quantity of each product for the collection.
Making selections only
This option you will not select products and the customer will just
be adding photos to the collection. If you just want the customer to be
picking 10 photos for example and not for specific products, you would
select this option.
Including Other Collection
This option allows you to create a collection of other collections. When selecting this option you will only be able to add other collections.
Once you create a collection you have additional options.
Limit Poses
Credit
Require all products to have photo selected
Extra Photo & Extra New Photo
Extra NEW Photo is the price for a pose that has not been added to the collection. This will allow you to charge extra for selecting a new pose.
Important! If you use the Extra Photo & Extra New Photo option, you MUST enter a price for both. If you don't, then they will be able to add photos to their cart for free.