I have a laptop display with a window resolution of 1920x1080. Attached to it is an external monitor with a resolution of 1920x1080 at 125% scale and another external monitor with a resolution of 1920x1080 at 100% scale. When the Flattener Preview window appears on the laptop display it appears as a complete popup window. If it is moved to either of the other external screens the window is partially cut off. There are no scroll bar options to access the "missing" parts of the window. It appears to cut off the bottom and right sides of the popup window. These missing sections do reappear if the Flattener Preview window is returned to the laptop screen.