Can't dock view control toolbox

Hi All,

Originally the view control toolbox appeared at the top of each view. Another user has had a play on my machine and now the toolbar isn't present at the top of each view. I can find the toolbox and activate it on the screen, but I can't seem to find how to dock it back to the top of the view window as it appeared originally. I would appreciate any advice on how to get this back to how it was by default.

Many thanks,