Typo3 7.2 Where to edit default templates + backend layouts?

Question

Where do I edit default backend layouts that come with typo3 7.2 official introduction package? there is a table in the db that holds backend layouts but only those that I created, not the default ones. But where do I find the colPos layout for the default templates that already come with the installation? I only want to make slight modification in the html template and I'd like to make the changes editable from the backend.

Answer 1

Backend layouts are defined via PageTS below mod.web_layout.BackendLayouts.<key>. This is not a standard functionality, but a possibility provided by one of the integrated extensions.

The mapping of the backend layout ids to the template files is done in the actual TypoScript template at the path page.10.file.stdWrap.cObject.<key>.value . For backend layouts created via the database, the key is the numeric id of the backend layout record .