oolEv.jpg" WIDTH="608" HEIGHT="407" BORDER = "0" USEMAP="#GUI">
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(The image is clickable: if you click on a button, you will be brought were it's talked about. But this is a presentation better than a reference document, so I strongly recommend that you read at least once everything here from the beginning to the end)<BR><BR>
The left area is used to display a part of the event scene, along with an optionnal grid. It can also display any geometrical element you previously defined in a global variabl