In a comment to our recent PDF review, Gary let us know about about Skim, a new open source project to produce a tool for reading and marking up PDFs. Skim already has a number of interesting tools, allowing you to:
- embed notes (both shorter notes that appear over the PDF, and anchored notes which are marked by a speech bubble icon that leads to a separate window)
- add circles and boxes
- if the text in the PDF is selectable, highlight, strike-through, and underline.