Once you have created an Action Item, you can edit it by clicking on the card. On the back of the card (details section) you can do the following:
Adding Team Members
Adding members to the board allows everyone to visually see each phase of the project: what needs work, what tasks they're responsible for, and what’s done!
To add team members, click the sidebar menu on the right hand side and you’ll see a section towards the top called “Members.” Click the “Add Members” button and enter their name (if they’re on Trello) or their email address (if they’re new to Trello).
Discussions
Easily carry on a detailed discussion without anything ever getting lost in an email chain. On the card back team members can comment, make updates, and collaborate. All of their comments are logged with timestamps, so they are always there for reference.
You can also @ mention someone on a card back so that person gets an alert. You can manage your settings to receive Trello alerts instantly, periodically, or never.
