How to modify an existing DisplayBox with JSL
I'm trying to create a button that will modify the output of the Fit Model() dialog to include a Predicted R2 in the Summary of Fit table. I grab the current window and then I need to activate the PRESS statistic. After this it's straightforward enough and it mostly works if I've already activated the PRESS statistic through the contest menu. It also works if I code the Fit Model dialog myself ...