Controls the dimensioning of tee and tap branches to allow dimensioning to the edge of pipe.
Click Show 
to display a gallery of shapes, and then select the appropriate setting.
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CentreLine originates dimensions from the centerlines of the main run.
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TapAndSetOnStartPoint dimensions to the edge of pipe.
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TapStartPoint defines tap dimensions only.
Defines:
Option Switch - 81, Pos 9
I-Configure - Drawing.Dimensions.TapBranchDimension
For Smart 3D cable tray and HVAC isometric drawings, use this option to allow dimensioning
to the edge of cable tray and duct, respectively.