Shortcut to change the level of active audio-CHANNELS - NOT clip level?

Is there a shortcut to change only the level of active audio channels of a clip instead of the whole clip level?

I am editing video footage with multichannel mono-audio - sometimes there are up to eight mono-channels in one clip (up to five lav mics plus camera-mic plus boom mic and so on..).
When finishing audio it's easier for me to go expand audio components and adjust the volume of every track so I can see the approximate levels of every track in the audio waveform of the track.
For this to work, the clip level has to be unchanged - at 0 db.

Now while editing I need to get audio levels in the ballpark to be able to preview and listen to the video in about the same level. Now when I change volume with shortcuts I can only change clip volume - I have to change it in the inspector or expand audio components - which makes it hard to edit my rough cut because trimming the video does not affect audio then. So when I am finalizing I have to delete clip levels and start all over again from scratch.

So is there any shortcut to change only the level of the active tracks (most of the time there is only one track activated) - and not of the whole clip?