realVNC viewer with multiple monitors

I am trying to have vnc on multiple screens, and I don't have problem to pay for it. I using ubutnu 18 as client and want to connect to centos 7 server. I have read VNC viewer with multiple monitors, downloaded realvnc (version 6.19.325), but I can't find the Options->Expert->UseAllMonitors = True as the answer mentioned. Maybe it doesn't work for ubuntnu ? or just in the Enterprise version ? also I am familiar with the "large screen on multiple monitors" as how-to-start-a-vnc-session-with-multiple-monitor suggested but it is far for being comfortable. Is there any solution for this ?