[X4U] pdf

Joe Tinney jtinney at lastar.com
Wed Oct 19 13:47:29 PDT 2011

This is common when PDFs were scanned in or saved as whole images and not created from or as text. Essentially, there is nothing to highlight as it is a single image to the PDF reader.

For instance, if you were to use a PDF printer (like Adobe Acrobat's) to print a text document you should be able to highlight that text. However, if you were to use a scanner and save a scanned image as PDF (without using OCR (Optical Character Recognition) software) you'd find that you would be unable to highlight the text - as there isn't actually any digital text there - only analog text.

I hope I've explained it clearly.

Joe Tinney

-----Original Message-----
From: x4u-bounces at listserver.themacintoshguy.com [mailto:x4u-bounces at listserver.themacintoshguy.com] On Behalf Of scott-xlists at scotist.com
Sent: Wednesday, October 19, 2011 4:17 PM
To: A place to discuss Mac OS X for the casual user.
Subject: Re: [X4U] pdf

On Oct 19, 2011, at 11:17 AM, Winston MacKelvie wrote:

> Help. 
> In Preview I can highlte pdf docs. But not if all. Patent office pdfs refuse to accept highliting. However I can use the Preview shapes on them.
> How come?

Can you provide a link to a pdf that you can not highlight?

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