Quote:
Originally Posted by vonCZ
But every now-and-again I'll open a PDF file that appears to be text--you can highlight/select words, sentences, etc
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Actually, some pdfs allow highlighting stuff even though it's a scan. Acrobat pro has some OCR features where you can select whether you want the pdf completely rebuilt or only have some "invisible" text behind the scan so you can highlight and search the text within the scans.