To mimic the default Ghostscript parameters by using the registry, the following parameters would be entered:
Default entries for GSPDFOptions would be:
-dNOPAUSE
-dBATCH
-dSAFER
-sDEVICE=pdfwrite
-dAutoFilterColorImages=false
-dColorImageFilter=/FlateEncode
-c
.setpdfwrite
-f
Default entries for GSImageOptions would be:
-dNOPAUSE
-r200
-dJPEGQ=75
-sDEVICE=jpeg