Tango Interactive has two drawing tools:
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Paintbrush - this is a very simple drawing tool, but is fairly fast. I use it to draw diagrams on-the-fly during class. I can even draw equations with symbols like "capital sigma".
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Whiteboard - this is a fully functional drawing tool. It is slower because it allows you to change all sorts of drawing properties with popup boxes. I use it if I need to prepare a diagram ahead of time. Unlike Paintbrush, when the students connect, what is already drawn will show.
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In the future, you will be able to load previously drawn pictures.
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Both drawing tools allow all participants to draw, so you must warn students not to draw on your diagram!
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