You can save a PowerPoint presentation as a PDF to lock its content and formatting in place, so that other people can view the file but can't make changes.

You just need to click on the Save as option and then set the output format as PowerPoint Show (.pps or .ppsx). Now read: How to convert OneNote to Word or PDF in Windows.

Sometimes when you need to save a presentation in PDF format, some hyperlinks and notes can be lost. To avoid this problem, you can use the OpenOffice software to save Powerpoint presentation or PPT ...