Thank you very much Michael.
Right, different, appropriate, interactivity for different scripts.

I think I'll redo cone unwrap using pointpicker of the apex with frustum selection button as the split between menus.
(The alternative would be two mode buttons at the beginning, using the History style pair of buttons to split into two selection menus.)
(Both seem to be good choices.) (I'll redo the prompts also.)

For my simple 2D curve script, a pair of mode buttons seems a better choice.

Since I've used History button only a couple of times over the last several years, I did not realize it had a pair of buttons.
---unexplored MoI gems---
I'll study the History script today :-)

- Brian