Using 3D Sketching Capabilities
When sketching in 3D, you can snap to the major directions, X, Y, or Z, and constraints are applied Along X, Along Y, and Along Z, respectively...When sketching in the 2D mode on a 3D plane, entities that are not on the active sketch plane are muted...In a 3D sketch, right-click in the graphics area and select Show Sketcher Triad