The PDF viewer works even if you’re offline (as long as the file has been downloaded to your device, of course). You can also share files directly from the preview, and they’ll automatically be added to your ‘Sent files’ folder.
In-document search works for PDF, Word, and PowerPoint files to help you find exactly the information you’re looking for. The preview highlights all the places the word appears in the document.
The update is rolling out to the Play Store over the next few days.