In order to help you in the most efficient way it is important to distinguish between:
the material contained in CERN Document Server:
For issues regarding the content of CDS you should refer to the service in charge of the material (publication, image, video, etc.) according to references you find in the page (including the name of the collections of records) or contact the author(s)
the CERN Document Server application itself (functions, issues, etc.):
For issues about using the application itself, please: