Sometimes you may get PDF attachment in your inbox, and want to view it, than it will open in Adobe Acrobat. Gmail adds an online PDF Reader, powered by Google Docs. Every time you receive a PDF file attached to an email, you can read it by clicking on the link “View”, instead of downloading it.
Clicking “View” quickly opens a new tab, which promptly loads the PDF in Google Docs, without opening up Adobe Reader in your desktop. Other features of the viewer include options to zoom in and out, as well as quick paging via next/previous arrows.
If you want, you can still view in plain HTML from a link at the top of the new viewer. And if you want to download, save, and view your PDFs later while offline using client software, you can still do that by hitting the “Download” link.