Where is the button??
The sim notes say on takeoff to push the N1 button after engines stable at 70%N1.
Do they mean the TOGA buttons on the thrust levers?
The only N1 button we have (B738) is on the MCP and it's not used to engage the Autothrottle and set takeoff thrust at takeoff we use it to set climb thrust at the acceleration height.
Where is this N1 button or is it another name for TOGA.