BoxSize

Function With BoxSize you can resize a group box
Example BoxSize G[General data] (5,40)
Format BoxSize G[Box] (rows,columns)

rows is the height and  columns the width of the group box. If one of the two values, i.e. for rows or columns, is entered as 0, then its previous value will be retained.

Tips
&Tricks

You can find examples in GuiXT tutorial 1.

BoxSize