Green dot and Boeing 777

[Haroon]

Hi

1) Unlike Airbus could'nt find the green dot on the speed tape of a Boeing 777.

Below 20,000 it perhaps shows up as "UP" speed. But what happens above 20,000? Does it show up?

2) In B777, If the heading reference is TRU in the descent phase, the ND displays a flashing amber box around the word TRU. Whats the logic?

Thanks