Adding a member to a board
Open the board to which you wish to add a member
Open the board's sidebar ( the ... icon)
Select "Add Members" from the Members section
Search for members by name or email address.
If your board is part of a workspace, you can select "Workspace" from under the search field to filter your search by members of that workspace only. You can also add members from your device's contacts by selecting "Contacts" from under the search field.
Removing a member from a board
Open the board
Tap the '...' in the top right of the screen
In the "Members" section, tap the member you wish to remove
Tap "Slide to remove" and slide your finger to remove the member
Admins can remove all members from the board. Normal members can only remove other normal members (not admins) from the board.