To chat with someone at the helpdesk, type your first name in the "Nickname" box at left and click Connect. (If you are on a Unix system, click the Unix button first).

Two windows will open on your screen. The first (blue) one is a "control" window, and the second (green) one is the chat window.

Note: Sometimes the chat window will be too small to see what's happening. If so, grab the lower right corner and stretch it out to fill your screen.

After the green window is open, carry on a conversation by typing what you want to say in the line at the bottom of the green chat window and press Enter.

When you have finished chatting, close both the blue and green windows, or just go to another web page, or close  your browser.