useless, what happens when you had a double monitor set up in a previous session, then open it with a single monitor and you cant find it via user interface. it doesn't matter if you turn it off or turn it back on, because it thinks its undocked and on another monitor.
That is a good point. After removing the second monitor, the properties palette is still not visible. I was able to fix the issue by changing the scaling of the display to 100%, the properties palette became visible after this change and I could move it to a new place. This is what Autodesk is recommending: www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Project-Browser-is-missing-in-Revit.html
i found myself at the airport and in the same situation when back on the laptop only. Scaling the windows display options from the desktop worked ! THanks@@BIMforInteriorDesign
I am not sure. Maybe palettes are on the second display? I would try maxizing your Revit window or restoring it's size, whether this helps. Both palettes can also have very small size.