Hello. I am trying to learn how to set up Signal Mast logic. The JMRI documentation "JMRI: Signal Mast Logic" is pretty good but has me stumped when it talks about the?Signal Mast Appearance definition file. I've loaded a sample panel file (AFarfelu16Fadj1.xml) in order to learn something, but can't figure out where the?Signal Mast Appearance definition file would be for this. Nor do I know how to view r modify it. Thanks!