Hey Marty, I’ll have to look at that. I don’t see those 3 lines when I tap the brake button. When i tap the train brake just another lever comes up. Like the slider train brake from the cab2 remote.
Just so we are talking about the same Brake / Boost...
Train Brake is different from Brake / Boost. Train Brake on Cab3 is the same as the slider on the left hand side of the Cab2 remote. Brake / Boost is the similar to the rocker switch on a Cab2 that Boost, Brakes, and changes direction. On cab3 there is a separate direction button though.
These buttons replicate the Brake / Boost functions of Cab1L or Cab2.
Tap the lower "Arrow" and the Brake expands out. Replicating the brake button of Cab2. If you don't initiate and control will revert back in about 2 seconds but if you tape and then use the control it will stay expanded until you remove your finger. Pull down and the brake engages. Pull further and it slows faster. The boost works the same but opposite.
Tap the top "Arrow" and the Boost expands.
In the Cab3 Settings menu you can select whether the Brake / Boost Holds where you disengage it or returns to where it was before using it. This also replicates the Cab2 functionality.