[StephenGL]

Fairly useful reference. Nees a key for the colors. I had no idea what the dots meant.

[gotofritz]

There is a key... although they should use tooltips so that when you scroll the key out of view you can still tell which dot is which but rolling over them

[StephenGL]

Or just scroll the key with the giant "Select a property" thing.

[wbobeirne]

There are tooltips, at least in the form of alt tags.