PDF Elf can help you read and annotate scientific papers in any PDF file. It is also great for viewing and searching PDF file. It is the best tool for reading and note taking on the scientific paper in PDF file format.
Annotation
Add Text, Anchored, Circle, Box, Highlights, Underline, Strike and Freehand drawing on the PDF.
Searching
Text-search features in PDF Elf make your documents easily searchable. This is very useful when the PDF is large in size and multi-pages.
Talking
PDF Elf has integrated text to speech conversion feature that makes text audible without additional software.
Notes
PDF Elf allow you add your notes to a PDF document in boxes that look like paper sticky notes, or more extensive anchored notes that can be viewed in a separate window by double-clicking.
Reading
Easily zoom in on text, and Scroll, Magnify, Select as easy as one click.
Bookmark
Used bookmark to keep your place in your documents and to enable you to return to it with ease.
Communication
Email your creative PDF files to your friends in Twitter or Facebook.