You can also add annotations to PDF documents.
Press 3 seconds on any place in a PDF document, and the Annotation Options will show. You can add a Note, a Signature, freedraw (Ink), Text and shapes (arrow, line, rectangle, ellipse) to the PDF.
Use the Share button () to send the PDF with the annotations.
You can also search for specific words in PDF documents.
Click on top of the PDF viewer, right below the status bar.
The search bar will appear where you can type and search in your PDF document.