What's New: 2021.1
When a new route is created and populated in the tube and pipe assembly, the new route displays as populated, not as centerlines. Centerlines are not displayed even when the pipe run is set to defer updates. By default, the route centerline is invisible in all associated drawing views. You can recover the centerlines of new routes at the individual route level.
Once routes and runs are populated, linear, angular, and radius dimensions are still visible. To clear the view, activate the pipe run, right-click the route and use the Dimension Visibility option to hide dimensions for appropriate routes. Note that on the View tab Visibility panel
Visibility panel Object Visibility drop-down menu, the 3D Sketches option can hide dimensions temporarily, but does not hide dimensions permanently.
Object Visibility drop-down menu, the 3D Sketches option can hide dimensions temporarily, but does not hide dimensions permanently. 
Secondary occurrences of routes cannot be populated. If all routes in a pipe run are non-adaptive, the Populate Route command is not available.
 On the ribbon, click 
			 Pipe Run tab
 On the ribbon, click 
			 Pipe Run tab  Route panel
 
			  Route panel 
			   Populate Route .
 
			  Populate Route . 
		  The Model browser and graphics update to include generated conduit parts, library fittings, and gaps if appropriate.
 On the ribbon, click 
		Pipe Run tab
 On the ribbon, click 
		Pipe Run tab  Route panel
 
		 Route panel 
		  Populate Route .
 
		 Populate Route . 
	 The Model browser and graphics update to include generated conduit parts, library fittings, and gaps if appropriate.