because I use 5.1 sound I have 5 sound tracks, but when a I want to change the volume , I have to do it track by track, i want to do it all at the same time. Than you
You can change multiple Track and Event volumes... and copy/paste Envelope points from track-to-track, but I am not aware of a parameter to simultaneously adjust envelope points on multiple tracks... Good question.
I think I might have asked for this, and/or a 'Copy/Paste Envelope' function back around Vegas 5, or was it 7....?
Not to mention Folder Tracks, eh Hallsound ;-)
And whille we're at it, concurrent multiple format time displays.
And a simple track 'lock' button (FX, gains, position, times, envelopes and all) in the track header - sometimes the ease of editing in Vegas can be a liability if one's mouse-finger-work is sloppy or tired.
And for a default track setting to be allowed to remember 'Mono'.
You should be able to do it with automation. Enter write mode, select all the tracks you want to adjust together, then play the project and move the volume up and down, they will move together and be recorded as automation...
... but equally you should be able to copy-paste and existing envelope. Almost everything else follows the standard and highly intuitive Windows paradigm...