I have created a ZClass, "BookReview", as a subclass of ZDTMLDocument to hold book reviews. The document ("raw" property) contains the review, and I have created a property sheet, "Properties", to contain variables such as: -bookTitle -bookAuthor -bookPageLength -reviewer The BookReview class has a method, "index_html", that orchestrates this information into a standardized presentation. I would like to add the ability to add an image of the book cover to the property sheet, similar to the way that someone can add an icon to a ZClass in the basic view. The closest thing I have seen is adding the ObjectManager class to the base of "BookReview" and creating a method to upload a file into it. This however does not allow our writers/editors to accomplish this task from within the Properties view of the instance of "BookReview" they just created. Any advice, direction, or better method would be appreciated.