To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month. You can password protect a PDF in Adobe Reader by ...

Right-click (or Ctrl-click) on the PDF file you need to sign. Hover your cursor over "Open with" and click on "Adobe Acrobat Reader." Click on the Fill & Sign icon, which is represented by a ...

And you’re done! Now, if you want to add your signature to a PDF, just open your document using Adobe Acrobat Reader and click on the Sign yourself icon. You can then select your saved signature ...