Fire Tuner Questions

[GeneN]

I'm starting a Firaxis Live Tuner journey. Perhaps an experienced hand could answer:
1. What does g_PanelHasFocus control?
2. What is TunerDebugMode? (as in LuaEvents.TunerEnterDebugMode())?
3. When should code be added in the <EnterAction> XML item?
4. When should code be added in the <ExitAction> XML item?
5. How should an item be selected for <CompatibleStates>?
6. How should an item be selected for <LoadStates>?
7. How are new <CompatibleStates> or <LoadStates> items created?

Thanks in advance for any help!