Eizo CG210 - Manual (Page 44)

2.When the screen image is expanded or contracted, restart the
PC.
The ActiveRotationII function may not work correctly using with some graphics
card or OS. When the screen image remains to be expanded or contracted after
restarting the PC, please try to change the screen resolution setting of your PC
system.
* The "ActiveRotationII Utility" (for Windows) allows you to change the display
oriantation easily. Please refer to the readme.txt in the EIZO LCD Utility Disk
for the details.