On the paid plan or above, the settings screen for your board will show you a list of the current users who have referee privileges for your board, and allow you to add one by entering their email. If the email belongs to an existing scoreboarder user then they’ll be added straight away, otherwise they’ll be sent an invitation email and will receive their newly granted privileges on signing up.

By default referees can create matches or tournaments, but you can also decide if referees are able to “quick add” members when selecting members for the corresponding match or tournament.