og:1543243109 wrote
Have you ever used the drag&drop? It does not work for mediafiles if the target namespace do not contain at least one file.
You can create new namespaces in the interface. Hover your mouse over the root namespace and you get a little "Create new namespace" icon. Click it, enter a name and then drag this namespace where ever you want it in the hierarchy. Then you can move your files there.
og:1543243109 wrote
But, what i'm missing is different. I don't want to fiddle out all the images used on a single page and move them by hand. So what i am looking for is to move the page, and all imagedata used on this page from the same namespace, to another namespace.
I don't think that exists.