In windows 10 you may find that display manager does not show all of your monitors plugged in.

It appears that MS actually included 2 different display mangers in windows 10.

DO NOT right click the desktop and go to display settings.

1. Go to control panel and select “Display”

2.Select “Project to a second screen"

3.Chose “Extend"

4.Go back into Display and chose “Change display settings”. (Note: This must be done here and not display manager.)

5.Here you can enable the screens, configure resolution and position.