Autodesk AUTOCAD 2006 Command Reference Manual page 574

definition is used for subsequent insertions of that block. You can replace
an existing block definition with an external file by entering the following
at the Enter Block Name prompt:
block name=file name
Updating a Block Definition: If you make changes to a block file that is
inserted in your drawing and you want to change the existing block
definition without creating a new block insertion, enter the following at
the Specify Insertion Point prompt (following the Enter Block Name
prompt):
block name=
If you enter = after the block name, the following prompt is displayed:
Block "current" already exists. Redefine it? [Yes/No] <No>: Enter y , enter n
, or press ENTER
If you choose to redefine the block, the existing block definitionis replaced
with the new block definition. The drawing is regenerated, and the new
definition is applied to all existing insertions of the block definition. Press
ESC when prompted for the insertion point if you do not want to insert a
new block into the drawing.
?—List Block Names
Lists the blocks currently defined in the drawing.
Insertion Point
Specifies a location for the block or drawing.
Enter X scale factor, specify opposite corner, or [Corner/XYZ] <1>: Enter a value,
enter an option, or press ENTER
X Scale Factor
Sets X and Y scale factors.
Enter Y scale factor <use X scale factor>: Enter a value or press ENTER to use
the same scale factor
Specify rotation angle <0>:
All X and Y dimensions of the block or drawing are multiplied by the X and
Y scale factors. The block or drawing is rotated by the specified angle, using
the insertion point as the center of rotation.
Corner
Defines the X and Y scale factors at the same time, using the insertion point
and another point as the corners of a box. The X and Y dimensions of the
box become the X and Y scale factors. The insertion point is the first corner.
550 | Chapter 11