Look at the attached screenshot. It is taken from a lynda.com-course. The creator has a few windows open.
The changes he makes in the 3D-window can be seen in the bottom-left window.
I tried to recreate this: I duplicated the existing 3D-window. Made it smaller. Then put it on camera view.
But as soon as I click in the 3D-window, the camera-view window disappears from screen.
Question: how to do this? 3D-window and Camera-window, so that changes to the 3D-window can be immediately seen in the camera-window. Can the camera-window be docked?