Pro Channel not working (Solved by turning on Global button : post #6)

I'm thinking of exporting all the audio out and throwing away the existing project and start a new.
 
What is the best way to export individual track's audio clean, without the sound being effected by the Pro Channel, etc.. I don't mind using pen to copy down each and every setting track by track.. At this moment, I really don't know if the PC is effecting the sound at all..

Have you tried disabling the plugins in the fx bin in your master buss? Every once in a while Liquid Mix will hang up in my master fx bin, and it won't let audio through.

Resolve this by trial and error, not knowing what the Global button is suppose to do.
 
Problem #1 - many tracks gone silent
- actually due to all the default Pro Channel track compressor output gone to min setting - not sure how this was done.
- but only found this much later (after solving Problem #2) as I don't expect the output level to be set min and all the tracks was on narrow view. 
- This problem was solved temporary and wrongly by turning off the Global switch - but in doing so, it restores all the track volume.
 
Problem #2 - All Pro Channel modules was not responding
- solved by turning on each track's Global button.
 
In summary, the only problem was some how many affected tracks default PC compressor was all turned to min.
 
Question :
 
What the Global button does. I've never even notice this button there (until now) and by opening some older projects I found that some were off and others were mainly on.
 
Is there an action that can trigger all the default PC compressor to turn the output level to min at the same time ?
 
Thanks!

Thanks John.