Autodesk AUTOCAD 2006 Command Reference Manual page 1331

Insertion Point
Specifies the insertion point of the selected xref.
Angle
Specifies the rotation angle at which an xref instance is inserted into the
current drawing.
Factor
Displays the unit scale factor, which is calculated based on the INSUNITS
value of the block and the drawing units.
Specify On-Screen
Displays prompts on the command line and makes the X, Y, and Z options
unavailable. The descriptions of the options displayed on the command
line match the descriptions of the corresponding options under Insertion
Point in INSERT.
Specify On-Screen
Displays prompts on the command line and makes the X, Y, and Z Scale
Factor options unavailable. The descriptions of the options displayed on
the command line match the descriptions of the corresponding options
under Insertion Point in INSERT.
Specify On-Screen
Displays prompts on the command line and makes the Angle option
unavailable. You are prompted for a rotation angle, as described in INSERT.
Uniform Scale
Ensures that the Y and Z scale factors are equal to the X scale factor.
Unit
Displays the specified INSUNITS value for the inserted block.
X
Specifies the X coordinate value for the point at which an xref instance is
inserted into the current drawing. The insertion point in the current drawing
is aligned with the insertion point defined in the BASE command in the
referenced file.
X Scale Factor
Specifies the X scale factor for the xref instance.
External Reference Dialog Box | 1307