Actions allow you to add another level of details to your tasks. You can add multiple actions to a task, they are aimed to be a list of things to carry out for your task, a checklist of sorts.
Actions can be found in different places of the task detail panel, with different usage.
Summary of actions panel
Task > Task detail panel: On the right, click on the “Actions” 
- Add an action to the task: enter the name of your action in “Add an action”, press “+”
- Assign a member to the action: click on the hexagon-shaped icon
- Mark an action as completed: click on the validation check mark
- Rename, delete an action or unassign a member: click on the 3 small dots
- Click on the assigned person’s avatar on the action to replace it.
When you create multiple actions, they are automatically ordered from oldest (top) to newest (bottom).
However, you can change this order by dragging and dropping actions.
Note : in this panel, you find all the actions of the task, regardless of their status (completed/not completed, assigned/unassigned).
Add an action quickly from the What tab
Task > What tab of the task detail : in the comments entry box, list your actions (one line = one action), then validate the comment. Then click on the 3 dots to the right of the comment and select « Transform into an action ».
This allows you to quickly add a “checklist” of things to do, for instance during a meeting.
Assign actions to task members
Task > Who tab of the task detail: Next to each member assigned to the task, click the actions button 
For each member assigned to the task, you can add, edit, or delete actions, and mark actions as completed.
In the Who tab, you thus have a distribution of actions by member. You can only view actions assigned to members.
Note : Setting an action as completed won’t have any impact on the progress of the task and won’t set the task as completed.