Typically, constraints are inferred between the view geometry and the detail boundary when you create model documentation detail views. In most cases this is sufficient. However, under special circumstances you may need to add additional constraints.
- Click Layout tab
Modify View panel
Symbol Sketch. 
- Click the detail boundary to constrain.
The symbol sketch mode starts. With the exception of the view geometry, all geometry is dimmed.
- Add the required constraints to constrain the detail boundary.
- On the ribbon, click Finish Symbol Sketch.