Master volume

Can anyone tell me where the master volume is for multitrack

just downloaded the latest Audition, and found it complete rubbish compared to version 1.5 which was brilliant and easy to use, may even go back to it if I cant find things, as bad as Microsoft keep moving things so you cant find them, also how do I get rid of that black background.

sorry to moan but am trying to use the latest version.

Brian