Look At Working Plane

Changes the view to be perpendicular to the working plane; similar to the Top view under the View menu in that you are looking straight at the working plane

Active Layer Plane Views

Sets the active layer plane as the reference for tools such as the Flyover tool, Walkthrough tool, and other viewing tools; used with the Flyover tool’s rotation center mode

Working Plane Views

Sets the working plane as the reference for tools such as the Flyover tool, Walkthrough tool, and other viewing tools; used with the Flyover tool’s rotation center mode