PowerPoint (for .ppt, .pptx, and other supported file types)
Windows:
- Go to File, then select Info.
- Select Protect Presentation, then select Encrypt with Password.
- In the Password box, enter the password you want to use. Select OK.
- PowerPoint will prompt you to confirm the password by entering it once more.
- Save the file to ensure the password takes effect.
Mac:
- Go to File, then select Passwords.
- Under Password to open, select Encrypt this presentation and require a password to open.
- In the New password box, type the password you want to use.
- In the Verify box, type the password again, then select Set Password.
- If you want to require a password to modify, just repeat the steps above but choose modify instead of open.
- Click OK, then save your presentation.