MATHCAD pirme 3.1 Dropdown list

[hi5chenchen]

Hi Guys,
Any one familiar with mathcad prime 3.1?
I am trying to create a drop down list(or list box) which allows me to do things similar to this:

Does prime version mathcad even gives such a function? if it does, can anyone give me a hint of where to start?

Thanks a lot![/b]

 

[KootK]

That functionality is not available to my knowledge. It's a point of much frustration.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.