I defined a customer print configuration for the PDF printer including a custom metric ANSI A size sheet with no margins. Upon exiting and restarting DraftSight, the print configuration is loaded but the custom paper size is not. The custom paper size is present in the configuration file (attached - zipped due to forum blocking cfg/xml file uploads).

DraftSight 2018 SP1

Ubuntu 16.04.3 LTS x86_64