I'm having a problem figuring out how to configure synergy to behave on a system with multiple X windows.

On my desktop I am running Ubuntu 10.04 LTS. I have two monitors, setup as separate X screens by preference as well as to enable me to rotate the left-hand monitor.

I also have a laptop, which I have on the desk in front of me, lower than the other two monitors. I have a very simple synergy.conf:

section: screens
    desktop:
    laptop.local:
end

section: links
    desktop:
        down = laptop
    laptop:
        up = desktop
end

It works, but on the desktop only on whichever screen I run synergys from in terminal (I haven't set it up to run at startup yet because I've been playing with the configuration).

I can't find any information how to reference multiple screens on one system, and would appreciate any help.