If you want to make the PDF file uneditable, you need to set encryption on the PDF file. Otherwise, we can set editing restrictions. The setting method is also very simple. After opening the file, click [File]-[Properties]-[Security], enter the password you want to set in the permission password, select the editing operations you want to restrict, and click [Save].
We can see that there are many items that can be selected in restricting editing operations. The most direct one is to restrict all operations, and there are also restrictions on operations such as inserting, deleting, and rotating pages. Restrictions on copying and pasting and restricting printing are also included.
If we want to remove restricted editing, we only need to follow the steps to set encryption, go back the same way, and delete the PDF password we just entered.
It should be noted here that when we set up encryption for PDF, we must remember the password or record the password in one place to prevent forgetting the PDF password, because we need to enter the password first to edit PDF and remove PDF editing restrictions before performing the following operations.
Why is it important to remember the password? In addition to the fact that the password is very important, it is because the PDF editor does not provide a password retrieval function, so if we forget the password, we can try to retrieve it ourselves, such as passwords we have used before, simple Numeric password, etc. Or we can use tools to help us remove restrictions on editing, such as the removal function in Okafeng PDF Decryption Master, which imports PDF files and cancels PDF encryption with one click.
