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.