title: Saving per-user or per-document preferences in a Photoshop script
body: <p>I'm working on a Photoshop script in JavaScript using ExtendScript. My script allows some user input, and I'd like to save it between uses. That is, I'm looking for a way to save a simple string or numeric value under a particular key so that I'll be able to access it on subsequent uses of the script. Simply put, I want to save a preference for my script. How do I do that?</p>
  
  <p>Even better would be to be able to save at least some preferences on a per-document basis. Is that possible? That is, can I store an arbitrary bit of data with a document?</p>