I think you just need to drag your toolbar farther to the right.
It's easiest to do when the viewer or find panel are on the bottom, as you'll see it move to the right of them when it's in the right position.
At the moment you have the toolbar docked to the right of the file display, but there's a position beyond that which goes down the side of the whole window.
Ok, thanks; not sure how I did it, but it is now far right occupying the entire vertical right side of the monitor; and remains there when viewing. Thanks.