I am trying to use the constraints options:

• NOT ENFORCED
• DEFERRABLE
• INITIALLY DEFERRED
• NORELY

However it seems I am not able to use them successfully. 

When I try to use them with PRIMARY KEYS (not sure if it is possible), I am not able to enforce any key.

And it also seems I cannot use them with other constraints:

How are we supposed to use this constraint option? Thank you