Navigation forms add a layer to the hierarchy of the related objects. The syntax is
Code:
Forms!NameOfNavigationFormHere!MainFormNameHere.Form!subformControlNameHere.Form.Property/Method/ControlNameHere
If you didn't change nav form name, I believe the default name is "Navigation Form". SubformControlName may or may not be the same as the subform name, but that is the default as well (which is something I don't do).
I venture to say that most helpers here don't use Navigation forms because they are somewhat limiting. A switchboard form is usually better, but not the built in one.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.