The number of fields you can display on a card is 3. If you are unable to add a field to the card layout on a board (backlog or sprint) you need to delete one first so that the Add button appears.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.