There are many options, here is one using Table Box
Names Default To Here(1);
dt = open("$SAMPLE_DATA/Big Class.jmp");
cnames = dt << Get Column Names(string);
n2 = N Items(cnames);
lstNumCol = dt << get column names(numeric);
nw = New Window("Select Parametrs for Equivalence Testing",
<<modal, << return result,
clb = Col List Box(<<set items(lstNumCol))
);
lstColNames = nw["clb"];
nw = New Window("Select Parametrs for Equivalence Testing",
<<modal,
Table Box(
String Col Box("column", lstColNames),
Number Col Edit Box("practical equivalence ", Repeat([.], N Items(lstColNames)))
)
);
Other good option could be Lineup Box and using Number Edit Boxes. You could also update your initial window dynamically based on user selections, but I would start with something simpler like having two modal windows.
I would also suggest you add Button Box("OK") and Button Box("Cancel") if you are using modal windows. JMP will automatically add "OK" button but if you add it yourself, you can trigger actions when user presses that and generally it nice to provide user an option to cancel (remember to check which button user did press).
-Jarmo