Use this device to gainstage your mix across many tracks with a single fader. You'll need a track with a DC Offset device on it for it to work, see this video for an explanation: https://www.youtube.com/watch?v=8svJv8v_xOM
Here's an updated version that also allows you to push above 0. Version 1.0 only allowed you to attenuate signals, this version also allows to push up to 6dB (on the fader) by Reframinator