To Create a Top Chamfer Feature
A Top Chamfer feature can consist of a single chamfered edge, a single chain of chamfered edges (open on both ends), or a single closed loop of chamfered edges (for example, on top of a Pocket feature).
1. Click > 
Top Chamfer.
Top Chamfer.The TOP CHAMFER dialog box opens with the following elements:
◦ Feature Name—The default feature name, such as TopChamfer1 (the system increments the number for the next Top Chamfer feature). You can type a customized name.
◦ Define Feature Floor—Select the Floor surface for the feature (the surface of the chamfer).
◦ Adjust Feature Boundaries—Change the shape of the feature walls using Sketcher.
◦ Define Program Zero—Change the coordinate system used for feature definition and machining.
◦ Adjust Soft Walls—Change Hard Walls to Soft and Soft Walls to Hard.
2. Select the Floor surface(s). If the Top Chamfer consists of a chain or a loop of chamfered edges, select all the chamfered surfaces and click Done Sel. On the SELECT SRFS menu, click Done/Return.
3. Use the other elements, if needed. Click 
next to the element to display the current setting. The Preview button lets you check the feature geometry by highlighting the Hard Walls in red, Soft Walls in cyan.
next to the element to display the current setting. The Preview button lets you check the feature geometry by highlighting the Hard Walls in red, Soft Walls in cyan.4. Click OK to complete the feature, Cancel to quit.