TYPO3 v7 has reached its end-of-life November 30th, 2018 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.
There is no further ELTS support. It is recommended that you upgrade your project and use a supported version of TYPO3.
You can enter TSconfig for both backend users and groups. The resulting TSconfig for a certain backend user is the accumulated TSconfig for all the backend groups he is a member of. Thus you can override formerly set options from the user groups by entering another configuration in the TSconfig field of the user himself.