Right now, the Button Setup dialog box looks like this:
To associate a parameter with the button, it's necessary to (1) click on the scroll icon, (2) enter the parameter, then (3) OK your way back out. This is 2 unnecessary actions per button — #1 and #3. It should be possible to perform #2 (entering the parameter) right here in the Button Setup dialog.
I just completed making 20 copies of a button that'll perform a certain action (copying data in a particular field from one record to another), and the only difference between the 20 buttons is the name of the field affected, which I'm specifying by parameter. So this is 40 unnecessary actions associated with this one small task.
Not only would being able to edit the parameter right here be useful, but just for the love of goodness being able to quickly SEE the parameter from here (without having to roll over it and wait for the tooltip to pop up) would be extremely helpful. The edit option suggested here would serve both purposes. AND additionally, we should be able to see/edit more than just one line of the parameter at a time. The edit box should be taller in the script selection dialog, as should it be here too.