It would be really convenient to be able to name attachments in Paperpile. Right now, even when I only use them to store Supplementary, it is not immediate to tell what’s what (the “main PDF” flag is the only thing that helps). But I’d love to be able to store the different version of the paper as it evolves (either different versions posted to arXiv, or Preprint->Published, or different revisions of a paper under review). A simple label (and maybe a way to order/reorder the attachments) would go a long way in improving usability.