Sketch the runner lines which define the positions of the runners.
Select the datum plane or planar face where you want to create the runners. Within the runner options, this plane can be created, if required, using the Parallel Plane option.
Press Sketch on the MoldDesign Guide to run the Sketcher. Select the required plane, if you didn't previously select one.
Using the Line option of the Sketcher (this is the default option), draw the center lines of the runner bodies. These will be the skeletons of the runner system.
When you exit the Sketcher, the Feature Tree now contains a Sketcher feature.
Use the Runner Bodies function to create the runners around the sketched lines.