Hi Nick,

> Getting closer. Where is the tabs coding/definitions?

Those tabs (like "Construct", "Draw curve", etc...) are defined in SidePane.htm, they're made up of 2 sections, a <moi:PaletteHeader> for the top part with the tabs, you'll see some <moi:TabButton>s for each tab within the header, and then there is a <moi:PaletteBody> below the palette header, which contains the controls for each tab.

- Michael