AutoCAD MEP 2025 toolset uses duct, pipe or conduit routing preferences as specified in the domain’s Style Manager to insert the appropriate fittings as you draw a run. Auto layout can generate different routing solutions, from which you can choose the best one to suit your requirements. If you try to add or modify a part, angle, or transition that is not defined in the current routing preference, AutoCAD MEP 2025 toolset prompts you to make a part substitution.
Use the Styles Browser palette to search for and add, or change an existing routing preference.