Output lets you specify a custom XCI file that it uses for rendering. See Specify file locations for Output.
By default, Output overrides some of the options specified in the XCI file, including the following:
config/present/xdp/packets
config/present/pdf/creator
config/present/pdf/producer
config/present/pdf/compression/compressObjectStream
You can select options that cancel the override for the options listed above, in which case Output uses the values specified in the custom XCI file.