The reported behavior below is true for image windows, preview windows, and real time preview window. I can deal with the image and regular preview windows because I can right click on the image which allows me to resize things, but there is no such behavior for a real time preview.
I don't know if this is a bug or there is a technique to use, but when I maximized a preview, the top bar of the preview window disappeared above the tool bar and I could not get to it to reduce or delete the preview. I had to move all other data to another workspace, save, and then close PI to clear the problem.
Turns out the same is true for any image window when maximized. Is this a behavior of my screen resolution and something I will have to live with?
Larry