About Skim
A PDF reader and note-taker. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file.

- Viewing PDFs
- Adding and editing notes
- Highlighting important text
- Making "snapshots" for easy reference
- Navigation using table of contents or thumbnails
- View all your notes and highlights
- Convenient reading in full screen
- Giving powerful presentations
- Handy preview of internal links
- Many more features.