Part Modeling > Engineering Features > Auto Round > To Select Edges Using a Datum Reference and the Graphics Window
  
To Select Edges Using a Datum Reference and the Graphics Window
1. Click Model, click the arrow next to Round, and click Auto Round. The Auto Round tab opens.
2. Click the Scope tab. By default, all Solid Geometry is rounded. To exclude geometry, you must also use the Exclude tab.
3. Click Exclude. The Excluded Edges collector is activated.
4. Click Auto Round > Datum > Reference. The Auto Round tab is paused and the Datum Reference dialog box opens. A Reference feature appears in the Model Tree.
5. In the graphics window, select the edges you want to exclude from the round. The chains appear in the Datum Reference dialog box in the Chains collector.
6. After you select all the edges to exclude, click OK in the Datum Reference dialog box.
7. Click on the Auto Round tab to resume the Auto Round feature. The model appears with the selected edges highlighted. The Reference feature is added to the Excluded Edges collector.
8. Click to create the Auto Round with the excluded edges. The Auto Round feature appears in the Model Tree.