The maximum to appear is eight, but through the participants list you can choose the participants you wish to see. To communicate with conference participants, open your chat window by clicking on the CHAT button, and begin entering text in the lower portion of the window. When you have finished your statement, press return and your text should appear in the upper window, for everyone to see. Remember that everyone can see your text contributions, so don't write anything that you don't want everyone to see. Your text should show up on your video image.
Audio capabilities are available as well.
A window will appear that shows a speaker with a volume measurement bar below it, and a microphone, with a volume measurement bar below it as well. At the bottom of the window are several buttons. You can operate the audio Hands on, or Push to Talk, which operates much like a CB radio. On option sends your audio at all times. Your call should now be disconnected.