The Restraints option in the Display Options dialog, will display all nodal restraints applied to the model.
A node restrained in both the X and Y directions will display a triangular "pinned" symbol.
A node restrained in the X direction only, will display a vertical "roller" symbol.
A node restrained in the Y direction only, will display a horizontal "roller" symbol.
Non-zero "displacement" values will be represented by an arrow and the displacement magnitudes in the X and Y direction.
In addition, if Infinite Elements are being used to model the external boundary conditions, the Restraints option will show this by displaying arrows along the nodes of the external boundary where the Infinite Elements are applied.