A ps-setup% object contains configuration information for producing PostScript files using a post-script-dc% object.
When a post-script-dc% object is created, its configuration is determined by the current-ps-setup parameter's ps-setup% value. After a post-script-dc% object is created, it is unaffected by changes to the current-ps-setup parameter or mutations to the ps-setup% object.
Creates a new ps-setup% object with the (platform-specific) default configuration.