I use the preview pane often, especially with pdfs. But when selecting folders or files which don't have previews, or not even selecting anything, the preview pane stays, it's quite big, and I use lots when I have the explorer window maximised on my 1920x1080 monitor in this case it takes up about half my screen, but when I use explorer in a smaller window the preview pane shrinks the cneter folder pane and stays half the size of the window.

Is there anyway to only show the preview pane when the file has a preview and then hide it again when the file doesn't or not file is selected. (btw, please don't say about alternate file browsers, as they all look ugly and complicated)