ATR-72 Overhead panel Philosophy - Orange lines

[Seven Two Seven]

Hi Guys!!

I was studying for the refreshment about this aircraft and I was wondering why the ATR overhead panel has some pushbuttons surrounded by an orange line.

The pushbuttons are:

- DC Service/Utility bus
- ACW Generators 1 and 2
- DC Bus Tie Contactor
- Exhaust Mode
- Recirculation Fan 1 and 2
- Air Flow

Does anyone know why they are surrounded by an orange line?

This is not about Eletrical system failure.... seems to be related to an specific procedure...

Thank you in advance.

[Crashlanding]

Smoke in the cockpit, its the ones you will be switching.

That list is the ones in Electrical smoke, the other smoke category's will also use some of the ones listed

[JammedStab]

It helps you see where the switches are. At least in theory.