My Indesign artboard area is sitting seperately from the toolbar and rest of the window, with the close and minimise icons on the artboard corner and not on the corner of the full screen. I can't seem to work out how to get it back so it all sits toghether, might be a simple fix. I've tried resetting my workspace but not sure the best thing to try. In the screenshot you can see the space around the artboard window before there is the rest of the window.
Just drag the document window to the top of the main application window, it will snap into position. You will know when to stop the drag operation when the screen is highlighted with a blue boundary. See the following screengrab.
I have this ticked in my preferences and have tried dragging the window around to the top and to the side but for some reason the blue boundary is not coming up at all so it won't let me snap it into place.