Duct systems can be displayed as 1-line, graphical 1-line display, 2-line. Each variation refers back to the actual location in the 3D model.
You do not need to specify a duct system as 1-line or 2-line. You only need to create a system once using parts, such as duct segments and fittings. The parts in the duct system maintain their properties (such as part type, size, and connection type) whether they are displayed as 1-line or 2-line. You can use display configurations and system definitions to control the 1-line or 2-line displays of the duct system. You can switch a display configuration in a drawing to 1-line or 2-line. To use a combination of 1-line and 2-line displays based on nominal duct size, use a system definition for the duct system along with the appropriate display configuration for the drawing.
You can combine graphical 1-line, 1-line, or 2-line displays in the same drawing. You can use 1-line displays to create preliminary layouts, allocate space, or show a simpler view of a system in a complex drawing. For plotting purposes, you can also combine 2-line, 1-line, and graphical 1-line displays in the same drawing. You can display large diameter duct systems as scaled 2-line, medium diameter systems as scaled 1-line, and small diameter systems as graphical 1-line. In the following illustration, the larger diameter systems appear as 2-line and smaller systems as 1-line.
