To change a pipe line number

1. In a Plant 3D drawing, select one or more pipe components that are connected end to end.
2. Right-click in the drawing area. Click Properties.
3. In the Properties palette, click Plant 3D Tag Line Number Tag.
   Note:

   The Line Number Tag list cannot be set in the Properties palette if the selected pipe is not connected.

4. In the Line Number list, click New.
   
5. In the Assign Tag dialog box, in the box labeled TargetObject.Number, enter the line number (for example: 105).
   
6. Click Assign.