WX GUI FFT Sink, autoscale on starting up?

Hi all,

would it be possible to pass a parameter to the FFT Sink to have it
autoscale the waterfall to the tuned signal levels at startup ?

I have multimode.grc running but I would like to have the waterfall at
autoscale on starting the receiver.

Currently using GRC v3.6.2-201

Thanks for your time,

Kind regards,