All threads i was looking through are plugins for the old editor.
Someone any Idea? Cause there is no fuction of dynamic hight.
Sure, but the best approach depends on the context - i.e. how the other elements and/or text on the page need to behave.
Here’s one example…
Just resize the window to see how it behaves. The minimum height in that example is determined by the minimum page height (which I think is 600px). That example makes use of Align to parent (ATP) layout mode, but the same effect can be achieved with other layout configs and for other container types (floating group, etc).