Thank you for your quick reply. I actually did read the manual, but couldn't get it to replicate. I followed your link again to see if I missed something, and sure enough, I did (sort of). The manual states: "Drop a dialog in the center and it will replace the current dialog, with both dialogs ...

Hello, I accidentally undocked a dialog and in trying to re-dock, I somehow got the configuration seen in my attachment. Notice they are stacked horizontally with a "maximize-type" up arrow. Clicking on each will bring the dialog to the top. You can see I tried to add the "Layers"...