Twisties get their name from Lotus Notes. Basically, they are a graphical representation indicating whether something is expanded or collapsed.
You configure them by editing the CSS that is used with your content.
If I'm not mistaken, my Toolbarscripts also work with default twisties.
I didn't say otherwise. What I was trying to convey was that RoboHelp does not include such an option.
To be clear:
You can have a button on specific pages that uses scripts that Willam rewrote and that are described on both his site and mine. Choose your own tutorial as to how they work.
You can have a button on the toolbar that will work for all pages with dropdowns using the Rh twisties. Willam's script for that is referenced on my site and there is demo is from an old version of Rh but it still works.
I hope that is clearer.
See www.grainge.org for RoboHelp and Authoring tips