Open an already opened PDF document. Choose this if you need the PDF to be saved in a different folder. How to Change the File type for PDF Documents? For a PDF file to be viewable in an electronic office such as Google Docs, some editing information is required. Most document types are currently PDF documents and are often categorized through the following file type: · Microsoft Office files — .doc · Adobe Acrobat files — .ODT · Web pages (web pages for the internet) — HTML · PDF files — .pdf (all the others are listed) · .ods (other document types) Note that the list isn't exhaustive and as an example many Adobe Acrobat or Microsoft Office file types are also described as PDF, while only the most common Adobe Acrobat, Microsoft Office and Word file types are listed as being PDF.