This can happens, the default mode ( when you maybe do a clean install ) or when it is shipped from the GH. The default is " window" and not" full screen"
for some suspicious reason.

Solution:
If you find the full screen output is over the Zookeeper. You can hold down escape (about 10 seconds). This stops the output but still enables the user to access the engine setting. Using the drop down list for the output adapter. Graphics card adapter 2 can then be selected ( that is the proper one). By pressing apply this will apply the settings and bring the output up on the correct screen.

Another trick is to start up the Zookeeper, and move the half of the screens, and then start the engines, after that you can get "engine settings" and choose the output and choose adapter 2, press apply and when it is back, drag your interface to the proper screen.Voilá , here you go!!

Remember that IF you START the critter without a output screen and have only one screen, and you don´t know what the systems screen output are ( they are not marked) the standard is that the systems screen is the DVI in the middle of the unit and the output is the closest to the side. You will find out that Windows is the one to blame, it needs a screen there otherwise it will grab the output as systems screen.