Marshal can be configured using an include file SERTTKDEFS.inc . To enable an option make sure the line is set to $DEFINE. To disable an option set the line to $UNDEFINE.

{$DEFINE MARSHALNODEBUG}

This controls if you are able to see the Marshal form within the marshal session. If you want to inspect marshal then change this setting to undefine

{$DEFINE DATASETTRANSFORM}