Take out the screws from the switch. Re purposed the whitebeige wire previously line into a neutral by connecting it to the neutral bundle this wire goes to the single gang box.
Neutral Wire Check Please First Planned Install
How to install a neutral wire. Splice two more short line wires into each of the switches in the 3 gang box. Option 1 run a neutral wire if you want to use smart switches and dont have a neutral wire in your switch box you can hire an electrician to run a neutral wire between the light. A smart switch can simply tie into the white neutral wires to complete the circuit and get a source of power to keep the radios in the switch working at all times. Turn your breaker box off. The rewired configuration gains a neutral wire that enables you to use the new switch to control lighting. Re use the red wire as my travelercommunication wire.
Then pull the switch out of the electrical box. Work with electric at your own risk. You will find 3 wires a black hot a copper bare and a white which is your neutral wire. To install your neutral wire in your switch youll need to remove the wall plate by removing the screws that hold it in place. Pull out the existing switch so you can examine the wires. If any of this seems foreign or uncomfortable to you.
At this point you need to make sure the wire is neutral. Remove the trim plate covering the switch. A white wire or group of white wires mean theres a strong chance the box contains neutrals.