I would like to protect my documents, but allow the form to be completed.
Protection works on a computer, but if the document is in a cloud document, it is visible, but cannot be completed or signed on an Apple or Android tablet or cell phone.
How to allow a form to be completed and printed in a cloud document, without it being possible to modify the structure of the document itself.
Thank you Serge
Many PDF viewers do not respect the security policy, unfortunately. There's nothing you can do about it. Only complain to the developers of these applications. Do not count on a security policy to prevent someone from modifying your file, because it won't do it.