Volume Trim is a pre-fader control which allows the fine tuning of a single track's volume. For example, let's say you have four tracks, three tracks have their volume fader set to 0 dB while the fourth track's fader is set to +10 dB. You want to group the faders and do a slow fade out, but the slightly higher level of the fourth track causes its volume to be higher in relation to the other tracks towards the end of the fade out. To balance the fader levels, reduce the fader level for the fourth track to 0 dB and raise the Volume Trim value for that track to +10 dB. The resulting volume levels for the project are the same, but now you can group the faders and perform a fade out with no track standing out disproportionately at the end of the fade out.
