The fundamental unit of a board is called a card. Cards are used to represent anything from trucks, trailers, drivers, loads, etc. and appear in lists. This guide will go over most things that you will see once you are Editing a Card. Including explanations of Card Membership and the Card Actions Menu.
You can find information about Card Labeling Here.
Card Actions Menu
The Card Actions Menu is used to quickly edit information within a Card or to move, copy, or archive the card. To access the Card Actions Menu click the Menu Icon 
when you are editing a Card.
On a each card you will get the following options in the Actions Menu:
- Edit Members...
- Edit Labels...
- Edit Attachments...
- Move Card
- Copy Card
- Archive Card
- More
Under the More Action you can find a Link to the Card you are editing. This can make it easy to share Cards with another member of the Board.
Card Members
When a User gets added to a Card as a Member they will be alerted of updates that happen within the card. You can add Card Members at any time by clicking the Plus Icon 
below Members.