We often use a variety of video inputs, and the variation between the gain can be quite big. Obviously we usually try and tweak this in advance of starting the live stream, but I was wondering if there was a way to open the Gain dialogue box for the currently playing video using a shortcut key?

I would settle for having 2 shortcuts simply for gain up/gain down, but it needs to be on the input rather than the master gain, although I would prefer to be able to see what I'm doing, hence opening the dialogue box. And I specifically mean gain rather than the volume slider - usually I've already turned this up as far as it will go, but it's not quite enough.