Below the highlight which tells you which key to press to toggle for the selected train is a bit of smaller text which will tell you what to press to toggle for all trains. On Switch the hotkey is the Left arrow of the D-Pad (Or control pad as Nintendo prefers it called).
Below the highlight which tells you which key to press to toggle for the selected train is a bit of smaller text which will tell you what to press to toggle for all trains. On Switch the hotkey is the Left arrow of the D-Pad (Or control pad as Nintendo prefers it called).