class SetaPDF_Stamp {
boolean setVisibility ( [string $visibility='all'] )
}
Sets the visibility of a stamp for printing or viewing-purpose.
Follwing visibility states are available:
all
Default behaviour. The stamp appears in every state.
view
The stamp is only visible when the document is viewed interactively.
The stamp is only visible when the document is printed.
True if the passed parameter is an available visibility state.
False if the passed parameter is an unavailable visibility state.