hello everyone.
some of my PDF files not allowing me to select text to highlight it, they contian real text not images or scanned- based, and when I go to the document properties the commenting section is allowed and there is no security on document.
other PDF files are fine, I can select text and highlight it.
this is what happen when I select text in some documents
it is irregular and juming words. so irritating 
please help 
This happens when the file was created in a non-standard way, or is the result of a partially successful OCR process.
Basically there's nothing you can do about it with the free Reader. Report this issue to the author of the file and ask for a new version.
The only workaround you can use on this version is to use a different tool for the highlights (like the Square tool), or to hold down Ctrl before applying the highlight. That should switch it from text selection to free-form selection and you would be able to select an area to highlight, instead of just letters.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
AdChoices