Thanks Ben...that did the trick. Now the tool tray shows up on the main monitor as you can see from the pictures below.
The fourth monitor is used for the RealSimgear GPS.
Goran_M...The resolution of the three main monitors is 1680x1050 and 1280x720, which is recommended for the GPS.
Thanks for you help gentlemen, it's very appreciated. Now I have to learn how to takeoff with this bird.