To Create a Chamfer
You can create a chamfer with or without construction lines. To create the chamfer, you can select 2 coinciding edges, or a vertex defined as the coincident endpoints of 2 edges that can be trimmed.
1. Click Sketch and then click the arrow next to Chamfer.
◦ Click 
Chamfer to create a chamfer with construction lines that extend to the intersection point.
Chamfer to create a chamfer with construction lines that extend to the intersection point.◦ Click 
Chamfer Trim without construction lines.
Chamfer Trim without construction lines.2. Follow one of the procedures below.
Creating a Chamfer by Selecting Entities
1. Select a line or an arc, make sure to select the line at the point at which you want to place the chamfer.
2. Select the second entity at the approximate point at which you want to place the chamfer. The chamfer is created. When you select lines, the chamfer can have different dimensions on each side.
Creating a Chamfer by Selecting Vertices
1. Select a vertex, the coincident endpoints of 2 edges that can be trimmed, the chamfer is created. Select additional vertices to create more chamfers with this length.
You can use box selection to select multiple vertices.
2. To create another chamfer with a different dimensions, select two coinciding edges.