Types of placement for the Main Line layout tree branches.
| Constant | Value | Description | 
|---|---|---|
| esriLayoutLeftSideOfMainLine | 0 | Branches drawing out from the main line are placed on the left side of this main line. | 
| esriLayoutRightSideOfMainLine | 1 | Branches drawing out from the main line are placed on the right side of this main line. | 
| esriLayoutBothSidesOfMainLine | 2 | Branches drawing out from the main line are placed on the both sides of this main line. |