How are you connecting it to the display?
Thank you for your reply.
I just figured it out that I needed another cable.
Had it connected by HDMI, but this does not support the HD 2560x1440.
Just bought this morning a new display cable from small (for connection on my PC) to
normal (for connecting the monitor)
After a restart everything went smoothly and I have the resultion I wanted: 2560x1440.
Strange however that the Quick Start Guide did not mention the necessity of the display cable
and in the manual the manufacturer only mentioned the display connection as desirable.
But in any other connection the resultion stops at 1920x1080.
So: problem is solved.
Ton (A.E.) Hartink
Glad to hear it.