Windows 10 Home, 64-bit
15.6 FHD display
Intel 520 graphics
External display
Dell U2417H
HDMI interface
When I use the display control panel to extend the laptop display to the exernal monitor, both displays are enabled but they are set to a partial size, not full screen. When I disable the extended display and select only the external display (laptop screen off), the external screen is the correct full screen size. Any clue why I cannot run both displays at full real estate size?