Most other audio software and daws allow you to Option or Alt Click to set a slider or knob back to Unity (0db) Thanks!
In the 1.3 update you can Command Click (Windows Key on Windows machines) any knob or fader to send it to its default value (so faders on the mixer will jump back to Unity Gain).
Ah great! You guys are throwing me for a loop with the Cmd click as opposed to option! Thanks!