when flying my a320 on one screen i like to click on the glass cockpit display to enlarge so its a lot easier for me to see the speed and altitude.

 

when i fly with 3 screens the glass cockpit display wont enlarge and pop out into a separate window for some reason. im sure its to do with the it not being able to handle the wide screen but is there any way you can edit that in a cfg or something to make it work. 

 

any solution?

AFAIK, popup windows can only be displayed on the main (center) monitor.

Try right-clicking and "undocking" the popup window, then drag it to the left monitor.