Good question but no. I mean/meant the ALT pb (as in ALT HOLD) and not the ALT knob.
....I'm getting confused now. I thought you were talking about the Airbus?? There is no ALT pb on the bus.
The ALT button on the FCU seems to be an alternative option on the Airbus. On my fleet, we don't have the ALT button; instead, we have an EXP button. Pushing this button EXPedites the climb or descent, by adjusting the target speed to (I think) green dot (climb) or Vmax (descent).
Before anyone jumps in, I don't have access to the manuals, so the details may differ, but the principle applies..........
Anyway, while reading the report, I thought that it resembled one of my better sim checks!!