Routing Routing is available in SOLIDWORKS® Premium and SOLIDWORKS Ultimate. Contents Improving Performance in Flattened Harness Assembly Edits (2025 SP1) The editing tools in the Edit Flattened Route PropertyManager perform faster, enhancing your experience for editing flattened harness configurations. Create a Flattened Drawing with Cleaner Output The following updates in flattened drawings provide cleaner output and improved workflow: Customizing Slack Percentages in the Route Properties and Route Segment PropertyManagers In the Route Properties and the Route Segment Properties PropertyManagers, you can define a custom value for the Slack Percentage for individual route segments. This value overrides the slack percentage specified in Tools > Options > System Options > Routing . Enhancing Pipe and Tube Modifications When you edit a route assembly containing pipes and tubes, the SOLIDWORKS Routing software modifies existing components instead of creating new virtual components. Generate Guidelines to Follow a Route Path In the Auto Route PropertyManager, you can generate guidelines to follow a route path. The guidelines identify the nearest sketch segment that leads to its corresponding end connector and follow that path.