Constraint prevents nodes from moving in any of six degrees of freedom (DOF). Constraint is an integral part of the Individual Load.
Constraint can be created and edited only in Simcenter, only title and description can be modified in SDC Verifier.
To preview the constraint definition select it and press:
If the constraint was created in Simcenter while SDC Verifier was running execute Update from the Constraints context menu to load the constraint into SDC Verifier: