Lists allow you to group items in your collection together and are free-form, i.e. you can group items however you like.

Creating Lists

You can find the List Management by going to My Stuff  >  List Management

In List Management you can create, edit, mark as private or delete new Lists  -

To add a new List use the button on the top right  -

Adding Collectibles to your Lists

You can add items to your lists when you first add them to your Collection (using the Long Form), when editing an item, or from Collection Management using the Bulk Actions feature.

Sharing Lists

Just select the List you want to share, it will show as underlined as here in this example  -

Copy the URL and send it to the party you want to share with (or post it in a post or document).