The real life EFIS knobs on the 777 are actually a turn-and-hold spring loaded type with about 45 degrees of motion in either direction possible before it hits the stops. Deflecting the knob more results in faster acceleration of the value being entered on the PFD. They aren't free rotating knobs like they are in the NGX, which actually models them incorrectly.

To enable correct operation of the Goflight EFIS in the 777 to make the knobs operate the same way as the NGX: In the 777 FMC, select MENU > PMDG SETUP > OPTIONS > SIMULATION > Page 3, MINIMUMS & BARO KNOBS and set it to the rotary option.

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