>> It's very simple. Print to File and Preview have no access >restrictions. > >Is it hardcoded somewhere=3F Yes. >Couldn't we store this information in the add-on image, as attributes >for example=3F At the moment, I try to clone R5 as close as possible, but your are right that we should find better solutions where desireable. I wonder how this is done in R5? E.g. Preview opens several windows, (processes spool jobs simultaneously) but AFAIK Print to File only one at a time. I think this is also hardcoded. Another thing that seems to be hardcoded in the Printers Prefs of R5 are the transport addresses for Serial/Parallel transport and that Preview printer does not need a transport add-on at all. - Michael