By default, downloading multiple PDFs from a Lightbox will create a zip file containing each PDF individually. However, Asset Bank can give users the option to combine the PDFs into one. This must be enabled by our Customer Support Team.

If the functionality is enabled, users downloading their Lightbox will see a 'Combine PDFs' checkbox when downloading a Lightbox which contains two or more PDFs. 

When the checkbox is ticked the PDF assets will be combined into a single combine.pdf file and added to the Lightbox zip file (if the Lightbox contains PDF assets only then the users will download the combined file rather than the zip).
Asset Bank will maintain the order of the Lightbox when combining the files so changing their order will effectively change the resulting combined file.