Icon: The image at top middle of the message. Can be client textures (.tga) or web links
Text Color: The color of the text. Only 3 choices to prevent the carnaval ;)
Opacity: Obviously, you don't need to change this unless you have very good reasons. From 00 to FF
Height: (ADVANCED USE) The height of the message
Timer: How much time the message keep on screen before fade out. It's never less than 3sec
Use Html: (RYZOM TEAM ONLY) If the text include some html syntax

N.B.: The use of (()) and ((())) to emphase some words don't require the use of html

Close Action: (TR) Name of the main button (to close the message and continue the script). If empty, no button will be displayed and windows will fade out after timer or 3sec.
Next Url: (RYZOM TEAM ONLY) An optionnal url if you don't want continue the script
Extra Action: (TR) To add a second button
Jump Extra: The stage to jump if the player press the second button