After installing and running the program, in order to encrypt the PDF file, you need to perform the following steps.
1. Specify the program path to the PDF file to which you want to set a password.
2. Type in the appropriate fields the user password and owner password.
3. Select the permissions for the file modification: printing, copying, content editing, etc.
4. Select the backup type, and press the "Protect". Then, enter the name of the PDF file copies, which will be protected.
