You can shorten or lengthen
objects to meet the edges of other objects.
means you can first create an object such as a line and then later
adjust it to fit exactly between other objects.
Objects you select as cutting edges or boundary
edges are not required to intersect the object being trimmed. You
can trim or extend an object to a projected edge or to an extrapolated
intersection; that is, where the objects would intersect if they
If you do not specify a boundary and press Enter
at the Select Objects prompt, all displayed objects become potential
NoteTo select cutting
edges or boundary edges that include blocks, you can use only the
single selection, Crossing, Fence, and Select All options.
You can trim objects so that they end precisely
at boundary edges defined by other objects.
For example, you can clean up the intersection
of two walls smoothly by trimming.
An object can be one of the cutting edges and
one of the objects being trimmed. For example, in the illustrated
light fixture, the circle is a cutting edge for the construction
lines and is also being trimmed.
When you trim several objects, the different
selection methods can help you choose the current cutting edges
and objects to trim. In the following example, the cutting edges
are selected using crossing selection.
The following example uses the fence selection
method to select a series of objects for trimming.
You can trim objects to their nearest intersection
with other objects. Instead of selecting cutting edges, you press
Enter. Then, when you select the objects to trim, the nearest displayed
objects act as cutting edges. In this example, the walls are trimmed
so that they intersect smoothly.
You can extend objects without leaving the TRIM command. Hold
down Shift and select the objects to be extended.
Extending operates the same way as trimming.
You can extend objects so they end precisely at boundary edges defined
by other objects. In this example, you extend the lines precisely
to a circle, which is the boundary edge.
You can trim objects without leaving the EXTEND
command. Hold down Shift and select the objects to be trimmed.
Trim and Extend Wide Polylines
polylines trim and extend at their centerlines. The ends of wide polylines
are always square. Trimming a wide polyline at an angle causes portions
of the end to extend beyond the cutting edge
If you trim or extend a tapered 2D polyline
segment, the width of the extended end is corrected to continue
the original taper to the new endpoint. If this correction gives
the segment a negative ending width, the ending width is forced
Trim and Extend Spline-Fit
a spline-fit polyline removes the curve-fit information and changes
the spline-fit segments into ordinary polyline segments.
Extending a spline-fit polyline adds a new vertex
to the control frame for the polyline.
Trim or Extend in 3D
You can trim or extend an object to any other
object in 3D space, regardless of whether the objects are on the
same plane or parallel to the cutting or boundary edges. In the
TRIM and EXTEND commands, use the Project and Edge options to select
one of three projections for trimming or extending:
- The XY plane of
the current UCS
- The plane of the current view
- True 3D, which is not a projection
To extend an object
To trim an object
To extend objects in 3D
To trim in 3D using the
current view plane
To trim objects in 3D wireframe