Autodesk AUTOCAD 2006 Command Reference Manual page 1120

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
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.
Z Axis
Defines the cutting plane by specifying a point on the plane and another
point on the Z axis (normal) of the plane.
Specify a point on the section plane: Specify a point (1)
Specify a point on the Z-axis (normal) of the plane: Specify a point (2)
normal
1
1
2
2
cutting plane
side view Z axis cutting plane
sliced object
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
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.
View
Aligns the cutting plane with the current viewport's viewing plane. Specifying
a point defines the location of the cutting plane.
Specify a point on the current view plane <0,0,0>: Specify a point (1) or press
ENTER
1096 | Chapter 20