Cant edit PDF - but no Secury settings are enabled

[CarlHindsgaul]

Hi 

I cannot mark or comment or do anything else to a certain PDF on my PC.

When i clik file --> properties --> security, what I am shown is that commenting, signing and a few other things are "not allowed", the main option of "security method" just says "no security". If that was that case, I should be able to change what is allowed and what is not allowed. but I do not see any buttons that would allow me to allow editing, commenting etc. How can I do that? 

The very weird thing is that if I open the document in my mobile app (it is a adobe document cloud PDF) I can edit it just fine (on multiple devices), but not on my PC. 

Thank you for your help

[try67]

There could be other things blocking it from being editable, for example it can be digitally signed or saved as a PDF/A file.

Without seeing it it's hard to say for sure.

[CarlHindsgaul]

Thank you for replying! 

How can I check wether or not it is signed, and can I do anything about the issue if that diagnostication is correct?

[try67]

Open the Signatures panel on the left and see if there's anything there.