Autodesk AUTOCAD 2006 Command Reference Manual page 1123

ZX cutting plane
You can retain both halves of the sliced solids or just the half you specify. The
sliced solids retain the layer and color properties of the original solids.
Specify a point on the desired side of the plane or [keep Both sides]: Specify a point
(1) or enter b
1
The descriptions of the Point on the Desired Side of the Plane and Keep Both
Sides options match the descriptions of the corresponding options under 3
Points.
3 Points
Defines the cutting plane using three points.
Specify second point on plane: Specify a point (2)
Specify third point on plane: Specify a point (3)
3
1
3-point cutting plane
You can retain both halves of the sliced solids or just the half you specify. The
sliced solids retain the layer and color properties of the original solids.
1
sliced object
2
Digital Signature Contents Dialog Box | 1099
sliced object