To Un-bond two surfaces at a common edge:
1. Select the Surf-Bond Edges-Un Bond Edge command.
2. Position the cursor over the common edge between the two surfaces and click the left mouse button.
3. Repeat step 3 as many times as you want. The Un-Bond Edge command will stay active or current until you select another command.
Note 1: This command will not do anything if the picked edge is not a bonded edge.
Note 2: This command will delete the bonded edge relationship, but will not replace it with a merged edge connection. This means that the two surfaces will separate if you move one of the edge points.