Clip External References
You can specify clipping
boundaries to display a limited portion of an external reference
drawing or block reference.
You can clip external
references such as DGN, DWF, IMAGE, PDF underlays, or block references.
a clipping boundary, you can determine the portions of an external
reference or block reference that you want to display by hiding
the redundant parts of the reference inside or outside the boundary.
The clipping boundary
can be a polyline, rectangle, or a polygon with vertices within
the boundaries of the image. You can change the boundary of a clipped
image. When you clip a boundary, the objects in the external reference
or block are not altered; only their display is changed.
With the XCLIP, DGNCLIP,
DWFCLIP, PDFCLIP, and IMAGECLIP commands, you can control the following
- Control the visibility of the clipped area
of the external reference or block reference.
When clipping is turned
off, the boundary is not displayed and the entire external reference
or block is visible, provided that the objects are on layers that
are turned on and thawed.
Clipping results can
be turned on or off using the clipping commands. This controls whether the
clipped area is hidden or displayed.
- Control the visibility of clipping boundaries.
You can control the display
of the clipping boundary with a clipping frame. The clipping system
variable for XREF, PDF, DGN, DWG, and IMAGE underlays are XCLIPFRAME, PDFFRAME,
DGNFRAME, DWGFRAME, and IMAGEFRAME respectively.
- Invert the area to be hidden, inside or outside the
When you want the hidden
parts of the clipped reference displayed or vice versa, use the
grips to alter the display of the external reference or blocks.
With grips located at the midpoint on the first edge of the clipping
boundary, you can invert the display of the clipped reference inside or
outside the boundary.
The grips are visible
and can be used when the clipping system variable is turned on,
the reference is selected, and clipped.
After an external reference or block reference
has been clipped, it can be moved, copied, or rotated just like
an unclipped external reference or block reference. The clipping
boundary moves with the reference. If an xref contains nested clipped
xrefs, they appear clipped in the drawing. If the parent xref is
clipped, the nested xrefs are also clipped.
Resize Clipping Boundaries
If you want to change
the shape or size of a clipping boundary for external references
and block references, you can use grips to edit the vertices just
as you edit any object with grips.
In case of rectangular
grip editing, you can maintain the closed four-sided rectangle or
square shape of the rectangular clipping boundary because two vertices
of the same side of the rectangular clipping boundary are edited together.
NoteWith Clipping boundaries,
you cannot display self-intersecting polygonal boundaries. An error
message is displayed and the boundary reverts to the last boundary.
Limitations for Clipping
When clipping an referenced
drawing or block the following limitations apply:
- A clipping boundary can be specified
anywhere in 3D space, but it is always applied planar to the current
- If a polyline is selected, the clipping
boundary is applied in the plane of that polyline.
- Images in external references or blocks
are always clipped within the rectangular extents of the reference.
When you apply polygonal clipping to images in externally referenced
drawings, the clipping boundary is applied to the rectangular extents
of the polygonal boundary, rather than to the polygon itself.
To clip an xref
You can use
to clip their corresponding
xref attachments: DGNATTACH, DWFATTACH, PDFATTACH, or IMAGEATTACH.
To invert a clipped reference