Hi Juergen.

This time You don't have to touch php files :)

In Helix Template Options:

1. Layouts (tab) > Footer area - probably you have two columns footer1 and footer2 for modules. You can use them for custom content.
2. Basic (tab) > Footer area || more info: https://www.joomshaper.com/documentation/helix-framework/basic#helix-footer

You can publish module with php or html code inside footer1 or footer2 position. Don't make simple things harder.

Touching template core files is never a good idea, and that kind of customization is beyond support.

There is no separate file for footer, bottom etc. it's all built on different structure.

I want to optically transform (graphic layout) the complete footer container area. So this won't do with adding a module in position footer1 or footer2.

In this case I need to touch the template core files to inject code in the right position. I am not looking for support regarding the customization. I am just unable to find the php file where the footer container is encoded. Thats why I asked for direction, in what php file to find the code for the footer container.

And no, I am not talking about /features/footer.php. This one only contains the container content.