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