How to overwrite properties by user selection buttons

I have a Spotfire file set up which takes a list into a property through a multiline input box and outputs it into a table. The table is used to query an information link to bring in data. I would like to have a few buttons for users to select the assay they wish to see. How can I make it so the buttons either insert predefined lists of terms into the properties (targets, concentrations etc) or erase the previously input list and input the new list? I would like to have the multi line box availbale so users can modify the paramters or insert their own if needed. Is there a script that can accomplish this or a more efficient way to do this?

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