2012

If both objects being chamfered are on the same layer, the chamfer line is
created on that layer. Otherwise, the chamfer line is created on the current
layer. The layer affects object properties including color and linetype.
Use the Multiple option to chamfer more than one set of objects without
leaving the command.
Chamfer by Specifying Distances
The chamfer distance is the amount each object is trimmed or extended to
meet the chamfer line or to intersect the other. If both chamfer distances are
0, chamfering trims or extends the two objects until they intersect but does
not create a chamfer line. You can press and hold Shift while selecting the
objects to override the current chamfer distances with a value of 0.
In the following example, you set the chamfer distance to 0.5 for the first line
and 0.25 for the second line. After you specify the chamfer distance, you select
the two lines as shown.
Trim and Extend Chamfered Objects
By default, objects are trimmed when chamfered, but you can use the Trim
option to specify that they remain untrimmed.
Chamfer by Specify Length and Angle
You can chamfer two objects by specifying where on the first selected object
the chamfer line starts, and then the angle the chamfer line forms with this
object.
Fillet, Chamfer, Break, or Join Objects | 695