To Select Edges Using a Datum Reference and the Graphics Window
This topic is a continuation of the topic To Create an Auto Round Feature. It explains how to use a datum reference and the graphics window to select edges to exclude.
1. With the 
Auto Round tab open, click the Exclude tab, and click the Excluded Edges collector to activate it.
Auto Round tab open, click the Exclude tab, and click the Excluded Edges collector to activate it.2. Click > 
Datum > 
Reference.
Datum > Reference.The Auto Round tab is paused, and the Datum Reference dialog box opens. A Reference feature appears in the Model Tree.
3. 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.
4. After you select all the edges to exclude, click OK in the Datum Reference dialog box.
5. 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.
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.