Sets options when placing a cutting plane. This ribbon displays when you select a
drawing view. Click Place Cutting Plane 
command to place a new cutting plane.
Reference 1
Displays the text shown for the first arrow of the cutting plane.
Reference 2
Displays the text shown for the second arrow of the cutting plane.
The Reference 1 is always assigned to the point of the cutting plane that you placed first, while
the Reference 2 text is always assigned to the point of the cutting plane that you placed last.
Depth
Sets the depth of the cutting plane. This box only accepts positive values.