If a document you are viewing has an accompanying Word document, Powerpoint presentation, Outlook message, or one of many other native file types, you can view that native file without having to download it to your computer. Certain file types have a special native viewer - the Media viewer plays audio and video files, and the Spreadsheet viewer displays Excel spreadsheets. To see a complete list of supported native file formats, please visit this site and scroll to the "supported file formats" section.
If the document does not have a native file associated with it, the native viewer will not be accessible for that document.
To access the native viewer, click the 'Native' button, or press 'v' then 'n' on the keyboard. Notice that the layout of the native review screen and the tools available are identical to the text viewer. Note: If the native document does not have extractable text, you may not be able to select anything for translation or hit highlighting.