this says what items can be created underneath any given page, if you remove them from here, they are removed from that list (but no one can create that type of page under that document type)
No the menu I am talking about is the one in the Media Folder not at a Site Node. I been playing with the options on the Media Types, there an option to remove show at root, but if this is set it still shows under the child folders.
But. i would guess you want some folders where that is true, and others where it is not.
the answer is actually to create other folder types in the media types, and then use them for folders where say you only want images, you could create an ‘image’ folder, and then restrict what can be created underneath it.