This guide assumes you’re using Gmail and Foxit Reader, if you are not, the first steps may be different. If you do not have Foxit Reader, you can download here: http://ninite.com/foxit

1. Click the file, then click download.
   1. 
   2. If prompted, name the file and choose where to save it. Chrome uses the downloads folder by default.
2. Open your documents folder, then click Downloads on the left side.
3. Double click the file you downloaded.
4. Click the Home tab, then Typewriter. From there, you can write anywhere on the document.
   1. 
5. When done, click File, Save to overwrite it.