To Remove Tangency
1. Select one or more wireframe pieces.
2. Click > 
Tangency > 
Remove Tangency. Alternatively, right-click and click Remove Tangency. The tangency constraint applied to the wireframe piece is removed.
Tangency > Remove Tangency. Alternatively, right-click and click Remove Tangency. The tangency constraint applied to the wireframe piece is removed.3. Alternatively, when the constraints are displayed, select a constraint, right-click, and click Remove Tangency.