Accessing the security settings
To start protecting documents in MobiPDF, simply head over to “Home” → “Tools” → “Protect”.
![MobiPDF: accessing the PDF protection tools](/public/uploads/files/images/user guide/Protecting PDFs/protect_pdf_1.png)
If you’ve already opened a PDF file that you want to secure, you can also access this functionality from MobiPDF’s tool ribbon.
![MobiPDF: accessing the PDF protection tools from the tool ribbon](/public/uploads/files/images/user guide/Protecting PDFs/protect_pdf_2.png)