Command columns are designed to allow end-users manipulate the ASPxTreeList's data. Command columns are stored together with data columns within the ASPxTreeList.Columns collection.
A command column is represented by the TreeListCommandColumn class. It provides a set of commands that allow end-users to switch the ASPxTreeList to edit mode, update data, delete and add nodes, etc.
A command column allows multiple command buttons to be displayed within a cell. A command button represents a single command. There are five commands:
End-users can move command columns among visible columns or to the Customization Window, by dragging their headers. This is controlled by the TreeListSettingsBehavior.AllowDragDrop option.
Command columns can also display custom buttons within cells. You can create your own buttons, and define custom actions for them. For an example, see How to: Create Custom Command Buttons.