We are now including custom cloud file type settings (XML, HTML) in offline packages, resulting in better functionality in Studio when working with such XML or HTML files. If the file type has originally been a Studio file type with preview settings, the custom preview in Studio will be available. To ensure you have preview in both Studio and the cloud, first define the preview settings in Studio, then upload this file type to the cloud and refine it there. Such hybrid file types will support preview both in Online Editor and Studio.