I've got a choose from list action in my applescript but the number
of choices is rather large - I can't find a way to alter the height
of the control.
Ideally I'd like to only show one option and then have a drop down
list with a scroll bar but can't figure out how to do this in
applescript - any ideas?
Thanks
Short answer - you can't, at least not with vanilla AppleScript.
There are a couple of UI extensions to AppleScript that let you build
simple UI elements such as dialogs, and these will let you do it, but
I don't know their Universal state, and therefore suitability. Check
24U Appearance OSAX, and I believe Smile has something in this area,
too.
Failing that, your options re to build your app in a more full-
featured environment such as FaceSpan or AppleScript Studio