Project Tool Options

The following options are available in the Options panel:

Project through solids Project the edges on all faces through the entire solid instead of just the faces closest to the object you project.
Project silhouette edge Projects the outline, or silhouette, of a part. You must set the direction using the Select Direction tool guide.
Extend projected edges Extend the projected curves to the edge of the face(s) they are projected on.
Extend target faces Extend the target face when the projected face is larger than the target. See the example below.