In general, Generator HUDs contain a subset of the larger group of controls located in
the Generator Inspector. Additionally, the HUDs contain the Opacity and Blend Mode
Working with Generators
The Opacity parameter in the HUD is identical to the Opacity control located
in the Properties Inspector. This slider sets the transparency of the generator as a whole.
Several generators contain a separate opacity control in the Generator Inspector, which
is independent of the like-named control in the Properties Inspector.