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.

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 ...

1] Save file to a new PowerPoint Presentation If you are unable to save the current PowerPoint presentation, you can try saving it as a new presentation file. First, create a blank presentation.