From Competitions, select Manage Officials.
Select the Games tab.
Click the Game Officials button before the game to which you want to add an official.
Tick the box next to the name of the officials you want to add to the game. Click Assign.
The names will appear on the right.
NOTE: the Assign button will only display once you tick a box.
After you add the names, select the Appointment Type. This is the Game Official Role.
Click Update & Close.