93b8fe12_BlackBerry_Theme_Builder___6_0__Description
[Button] Show the Group Box [Description] 
You can click Show the Group Box to show or hide the group box in the preview area of the canvas. When the group box is visible in the preview area of the canvas, you can make changes to the appearance of the group box. This button appears on the toolbar if you selected the Controls button in the Inspector and you are creating a theme for devices running BlackBerry® 6.
Toolbar - Quick Reference Guide - BlackBerry Theme Builder - 6.0