Tree control indenting

I created a tree control and am trying to follow the Help on how to indent, but when I select an item, say "Signal Generator" and right-click, the "Indent Item" option is greyed out.  Is there something else I need to do?
Attachments:
Tree of Tests.vi ‏6 KB

Hello mrbean,
Your tree control has the row headers set to visible.  These headers are just a type of label not the actual data inside the control.  Since it is not the actual data they cannot be indented.  Try putting the actual data values beside the row headers and notice that you can select items and right click to see that indent is no longer greyed out.
Steven T.

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