Got it yesterday.
You don't. It's a regulated mod and depending which ohm stock coil you use depends on the ohms it will show on screen. Knowing smok it usually will show a fraction higher or lower than the coil states but that's nothing to worry about.
Unless of course this mod has something different to the majority of smoks out there.
Just a thought. You are using stock coils aren't you or have you wrapped and built your own.