This feature schould be a relative correcture to the actual dmx output. Every time you set up your moving lights in a different order physically you have to rearrange the home positions.
So it would be nice if you could click on the fixture in a settings window and arrange the PAn/TILT value by Percent.
For instance: Set all moving lights pointing to the Front at the same value...
Go to the settings value and add or remove some Percent for each PAN/TiLT channel
Save and its done.
So if you are arranging your fixtures in settings it has to be shown on DMX Output in in real time !!!