Page TSconfig Reference
The page TSconfig primarily concerns configuration of the modules in the TYPO3 backend, the most important section is mod.
The TSconfig for a page is accumulated from the root and extends to cover the whole branch of sub pages as well (unless values are overridden further out).
Note that the page TSconfig can be overridden on a user and group basis by user TSconfig again, for details, see section Overriding page TSconfig in user TSconfig.