Rockwell Automation GMLC Reference Manual - Manual (Page 55)

Publication GMLC-5.2- November 1999
18 GML Commander Overview
Understanding the Tag Explorer
The Tag Explorer provides a hierarchical tree of tag categories, as shown
in the example below:
You can navigate to any available category. The list of categories is
dynamic and is dependent on the options available and selected in the
Control Options dialog box. Selecting a category controls the detail view
in the Tag Window.