The
command allows you to define four types of transformations:

Translation  Translates one or more
features.

Rotation  Rotates one or more features
about an axis.

Scaling  Resizes one or more features
based on a ratio factor.

Symmetry 
Applies a Symmetry transformation by reflection.

Affinity  Transforms the absolute size by multiplying a scale ratio.

Axis to Axis  Transposes the geometry
from one reference axis system to another.
An Affinity transformation changes the absolute size of the selected
functional features by multiplying a scale ratio in a given direction to
a geometric coordinate value. Unlike the Scale transformation, each
direction of the referenced axis system may use a different scale
factor. If the scaling ratios for the three directions are dissimilar,
you may result in a deformed features.
The following inputs are
required:
Axis system: By specifying an origin, the XY plane, and
the direction of the X axis, the system will create a reference axis
system that the scaling ratios will be applied to.
 Origin: The new reference
axis origin.
 XY plane: The XY plane of the new reference axis system.
 X axis: The X axis of the new reference axis system.
Ratios: Specifies the scaling factor in a particular axis direction.
The user may specify a scaling factor for the X, Y, and Z axes. Default is “1.0” for each direction.