Routing Routing is available in SOLIDWORKS® Premium and SOLIDWORKS Ultimate. Contents 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.