By default, the IndentSiblingY property is 15 pixels. The PenLink property defines the width of the pen used to paint the links between nodes. If the PenLink property is larger than 1, its value counts when the control indents vertically the sibling nodes. Use the IndentSiblingX property to indent horizontally the sibling nodes. The IndentChild property retrieves or sets the amount, in pixels, that child nodes are indented relative to their parent nodes, which has effect if the ArrangeSiglingNodesAs property is exTree. 

The indent properties work differently based on the Layout property as follows:

• exLayoutTTB ( by default ) - the nodes are arranged from top to the bottom:
  • IndentSiblingX property indicates the horizontal distance between two sibling nodes.
  • IndentSiblingY property indicates the vertical distance between a node and it's child nodes.
  • InflateGroupY property indicates the vertical distance to increase the group of nodes (AddGroup). 

   

• exLayoutLTR - the nodes are arranged from left to the right:
  • IndentSiblingX property indicates the horizontal distance between a node and it's child nodes.
  • IndentSiblingY property indicates the vertical distance between two sibling nodes.
  • InflateGroupX property indicates the horizontal distance to increase the group of nodes (AddGroup).