How to use laser/flashlight

[ELECTRICALfish]

This might be silly but I am not sure what the key bindings mean by "TMB 2"

[Lukas]

It's the second thumb button on your mouse. If you don't have thumb buttons you need to change the keybind.

[Veridis Quo]

A workaround for this, I've just put an alternate key to "H" since its not used for anything else.