SmileOnMyMac has released an upgrade to its PDF editing tool with Optical Character Recognition (OCR) technology, PDFpen 4.5. The latest version integrates Nuance Communicationís OmniPage 15.5 OCR engine, delivering improved accuracy when performing OCR on scanned documents. Other changes include the ability to scan directly into PDFpen from either Image Capture or TWAIN scanners when using a Mac OS X 10.6 operating system, along with a new text-highlighting function which enables simultaneous selecting and highlighting of text within a single action.