Create a Read-Only PDF in Adobe Acrobat
4 STEPS
1. First step is to right click the PDF. Then select properties.
2. Click Read-only box
3. Click Apply
4. Click OK.
That's it. You're done.
Here's an interactive tutorial
** Best experienced in Full Screen (click the icon in the top right corner before you begin) ** https://www.iorad.com/player/2128738/Create-a-Read-Only-PDF-in-Adobe-Acrobat