Thanks very much.  I never saw the Ungroup and UngroupAll methods.  That provides exactly what I need.

Hi Craig,

If you call GroubBy method for a different columns grouping is cumulative. To just change the grouping to another column first you need to call UngroupAll method and then call GroupBy for the new column.

Currently, you cannot change the height of group by node. In the next release we will add a new property which will allow this.

Best Regards,
Nevron Support Team

1) I'd like to have a single NTreeList with three views showing either a list of nodes, nodes grouped by column 6, or nodes grouped by column 7.  It doesn't appear the NTreeList.GroupBy method supports this.  When I call it with null or on a different column it doesn't work as desired.  It seems once I call GroupBy I can never call it again on that NTreeList.  I found no way to refresh the NTreeList even if I cleared everything first.  The only solution I can think of is to have multiple NTreeList widgets for each view.  I've tried every way of calling GroupBy and EnableGroupBy I can think of to make this work.  Is there a way I can do what I want with a single NTreeList?

2) When I successfully call GroupBy I noticed my group node's height is taller than the other nodes.  Is there a way I can change the height of the group node?