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You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.
Page TSconfig Reference¶
The page TSconfig primarily concerns configuration of the modules in the TYPO3 backend, the most important section is mod.
The Page TSconfig for a page is accumulated from the root and extends to cover the whole branch of subpages as well (unless values are overridden further out).
Note that Page TSconfig can be overriden on a user and group basis by User TSconfig again, for details, see section Overriding Page TSconfig in User TSconfig.