Project

Project selected geometry onto the sketch plane as construction geometry.

Project to a Sketch Plane

On the Sketch ribbon, select the Project tool.
Select a face or plane as the sketch plane.
Select points, edges, or faces to project onto the sketch plane.
The selected entities are projected onto the sketch plane as dotted construction lines.
Right-click and mouse through the check mark to exit, or double-right-click.

Note: To convert a construction line to a sketch curve, right-click the construction line and select Create Curve.