Hi feroze!
Can you please report the exact versions of NoMachine on client and server? It is important to determine if we’ve fixed some of the issues you are experiencing.
About the multiple monitors on the server, we’re working on a feature that you will find useful:
Giving the possibility to switch between monitors of the remote server
https://www.nomachine.com/FR11K02797
While waiting for this feature you may have a better experience by disabling the scaling mode. You can do it by unchecking the button ‘Fit to window‘ in the Display menu panel.