Documentation Questions

[zardoru]

These are questions I'd want answered in documentation. These are assuming that Lua for SM5 exists. If it didn't, add those topics too.

How do I define a new screen, from scratch?
Where do I find an existing screen?
How do I manipulate individual elements in a screen?
What do the different metrics do?
How do I code a noteskin? What can lua do in noteskins? Does it have a particular way of slicing textures? How do they relate to metrics if they exist?
How do I manipulate the playing field?
How do I add things to the playing field through the theme? How do I do it through a song?
What are background events? Foreground events? How do I plug them to lua? Can that be done?
Where is the most up to date documentation that pertains to outfox's lua api, specifically?
How do I respond to events? Button presses? Mouse clicks? Pad inputs?
How can I make stateful things? Commands seem to be a fire-and-forget deal.