About Routing with Follow
When you create pipe segments by following an axis/cylinder or sketched geometry, you do not need to set a start point.
Use one of the following options:
• > 
Follow Sketch—Create a line segment based on sketched geometry.
Follow Sketch—Create a line segment based on sketched geometry.• > 
Follow Curve—Create a line segment based on a curve.
Follow Curve—Create a line segment based on a curve.• > 
Follow Pipe—Create a line segment based on an existing pipe line.
Follow Pipe—Create a line segment based on an existing pipe line.• > 
Follow Axis—Create a line segment coincident with an axis.
Follow Axis—Create a line segment coincident with an axis.