Represents the 4 legal values for the /P key in an OCMD dictionary. They specify the visibility of content with respect to the on/off state of the OCGs layers listed in the OCMD dictionary.
Values:
| IGPDFOCMDVisibility_AllOn | Content in the member groups is visible only when all groups are ON. |
| IGPDFOCMDVisibility_AnyOn | Content in the member groups is visible only when any of the groups is ON. |
| IGPDFOCMDVisibility_AnyOff | Content in the member groups is visible only when any of the groups is OFF. |
| IGPDFOCMDVisibility_AllOff | Content in the member groups is visible only when all groups are OFF. |