Build customized pages for each of your classes to better organize your cards. (flashcardmachine.com)
In the official user guide (PDF) there's mention of a display size option that allows you to customize the page layout and display preferences. (blog.the-ebook-reader.com)
Dating Factory provides tools to customize every page of your website You can add your own pages, or edit areas on the existing ones. (datingfactory.cz)