Image adjustments in PDF files

PDFpen, the PDF editing tool for Mac OS X has had a major upgrade and now includes the ability to redact or replace text, including OCR text. October 26, 2010

Edit Read-only PDF files

China's Gerry Jingrong provides some ideas for working with read-only Adobe Acrobat PDF files and Microsoft Word files-- what do you do when you need to edit or revise an un-editable PDF file? August 1, 2009