By default, the AllowEdit is set on exLeftClick + exDblLick, which means the user is able to edit the node's caption by double clicking the left mouse button. Use the AllowEdit property to prevent editing the node's caption at runtime, or to specify a different keys combination so the user can edit the node's caption. The LayoutStartChanging(exEditNode) event notifies your application once the user starts editing the node's caption. Use the NodeFromPoint(-1,-1) property to get the node from the current position.  The LayoutEndChanging(exEditNode) event notifies your application once of the edit operation ends. The Caption property indicates the caption of the node being edited. Use the Editable property to specify whether a specified node can be edited at runtime. The Background( exEditNodeBackColor)/Background( exEditNodeForeColor) property specifies the background/foreground color of the edit field being displayed on the node while editing. Use the EditNode to programmatically edit the giving node.