Share y-Axis among traces

Grafana v9.0.4

I have 3 time series: T & RH from one query and “Weather_RH” from a different query.
I would like to have both RH & Weather_RH share the same Y-axis in auto scaling.
Currently, I have 2 Y-Axis for those traces on the left (T is on the right). RH & Weather_RH have the same unit.
Is there a way to force them to share the same Y-Axis?
Would editing the JSON behind the panel config help? If that is possible, I will research how to do it.
I am new to Grafana.

Thank you