Rusty royalThe CubeThe Prisoner In all fairness the ref clearly didn't agree with the time added on by the 4th official as he added a fair bit of time beyond that indicated off his own bat.
It is the referee who tells the fourth official what to display on the board. It will then be adjusted for things that happened after he told him, or during the added on time, or in practice (for some reason that I don't understand) to allow an attack to complete. Also if the referee intends to add on 3 minutes 30 seconds, the board will display 3.
I think you will find that the fourth official puts up the minimum time to be added on
And how is that different from what I wrote?