You can start by clicking on the users who are present. You can mark this if they are not present but have been notified of their absence. Then, you can choose their function at the meeting, as well as who will be the secretary and one or more reviewers (also mark the chairman as a reviewer if they are to participate in the review).
A limited user who is set as the secretary for a meeting can manage and write the minutes.
Board members invited to the meeting are always listed from the start, but both these and other names can be removed from the attendance list by clicking the three-dot icon (···) and selecting "Remove" on the far right.
If you need to add more people, click the "Add more" button at the bottom-left.