Editor Library

The Editor Library comprises, well, a whole lot of stuff!
Unity menu items
The custom Selection and Brush Inspectors
The Tile+Brush
Custom editor windows
Component editors
UIElements
IMGUI tile editor
Diagnostic tools
Archiving functions
Tile+Painter
There's no exhaustive explanation or API reference for this part of TilePlus. This one also advises you that Molag Bal will visit you if you mess around with this code. Seriously, there's no need although there's a lot of clues for those who like editor code.
Painter is a Painting / Editing tool with separate documentation for you to read. It’s UI-Elements based and does away with the concept of brushes completely.