How do I select all mixer tracks and adjust volume all at once - Fl Studio

How do I select all mixer tracks and adjust volume all at once - Fl Studio

In fl studio, I have done all of my Eq’ing and mixing…now, to get ready for the mastering process, I am trying to get the headroom down to -6db. I am wondering how to select all of my mixer tracks that are in use in fl studio and turn the volume down all at one time. I’m sure this process is as simple as it gets, but I still cant figure it out.

You can just turn down the master mixer track by 6db.

click the first one, shift+click the last one?

does that work?

No, that just changes the name of the mixer track.

You know how to cop and paste notes in the piano roll by ctrl + left mouse click and highlight over the area. Try to do that