 For example, in the case where there is only a X server available at the remote end.It also acts as a window manager for the X server it is running against, but it doesn't actually have any window manager policy built into it.Instead, it takes all the window management requests from the applications, sends them over the wire to the client, who then issues those same requests on the real display, waits for further answer the real window manager gives, and then forwards that answer back to the xpra server.