Highlight Text tool not enabled

[rsharma_champ_81]

Hi,

I downloaded some open XML specification PDF/A documents (PDF version 1.4, created using MS office word 2007) from w3c website. I wanted to use the text highlighter tool to highlight the important portions so that I can refer to them later quickly but found that the tool is disabled. I even tried converting the PDF to a newer version (1.6, 1.7) and to PDF/X etc. but nothing helped.

When I see the Security Method it says "No Security" and everything (printing, editing, commenting) is "Allowed".

I don;t know how to enable the tool. Other editing related tools are also disabled (Text edit, Add Sticky note etc. )

Is this document protected, if yes then why is it saying "No Security", and is there a way to unprotect it so that I can highlight the text in it.

Regards

Rahul

[Bernd Alheit · Accepted solution]

Is the PDF/A mode active?

[rsharma_champ_81]

Hi Bernd,

Thanks for the tip, I just disabled PDF/A mode through Edit-> Preferences-> Document and now all the editing tools are enabled.

Regards

Rahul

[Urmi Byron]

I deactivate Pdf/A mode. Even now highlight text is not working. Please help me 

[Bernd Alheit]

Can you select text?

[Harperist]

I have the same problem (Highlight and other tools grayed out, no security restrictions in place), but when I try to find Edit>Preferences>Document to turn off PDF/A, that choice does not appear in the menu. The only mention of PDF/A in the help guide for my version of Acrobat is in "new features" and it does not tell me how to find this. How can I enable editing? I did not originate the document.

Thanks!