When a presenter performs a presentation, she should invoke mgpnet instead of mgp with the same argument. mgpnet will become an http server running on tcp port 9999 (by default), and invokes mgp as a child process. By accessing URL Fa http://hostname:9999/ , audience will be able to read the MagicPoint window currently displayed on the presenter's notebook. The webpage provided by mgpnet is designed in "client pull" manner; audience's notebook will reload the page, several times a minute.

If no option is specified, mgpnet will print the URL to be accessed by the audience to the standard output. This is useful for indicating the URL to be accessed on the presentation, like:

%filter "mgpnet"
%endfilter