For example, the Rectangle button lets you toggle between an empty rectangle and a filled rectangle. Added 256 colour palette, including 6 shades of grey. Files opened are sent to other users of the whiteboard, to ensure that everyone is drawing on the same canvas. Backwards compatible with version 2.0. Improved fill tool.
Dots are now a bit more sparse.
I think it's more useful this way. A few other little improvements. Still only one 30k file. Hover highlighting of toolbar buttons is not yet possible. The colour preview doesn't work unless the window you're trying to select a colour from is is active.