Controls how Smart 3D determines the placement point location for the structural reference.
You can select Start Point, 1st Component, or Off. When you select Start Point or 1st Component, the software automatically selects the location of the placement point on the selected pipeline. When you select Off, the software considers the User Defined Placement setting, which enables you to have full control regarding the precise location of the of the reference dimension on the entire pipeline, as well as which reference dimensions appear on the piping isometric drawing.
Defines:
Option Switch - N/A
I-Configure - S3D.Drawing.Dimensions.ColumnReference.Placement
You can use Automatic Placement and User Defined Placement cooperatively. For example, you can have Smart 3D place a start point reference dimension,
along with any user-defined reference dimensions that you have specified using the
Isometric Reference Dimension control point.