You can assign a password to a presentation so that only those who know the password can open the presentation. Passwords can consist of almost any combination of numerals, capital or lowercase letters, and special keyboard characters.
A presentation can have only one password. If you change an existing password when you share a presentation with others, the new password replaces the original. If you add a password after you share a presentation, be sure to notify participants.
Important: There’s no way to recover your password if you forget it. Be sure to choose a password you won’t forget, or write the password down in a safe place.
If your computer has Touch ID, the fingerprint recognition feature, you can use it to open your password-protected presentations with your fingerprint alone.
Choose File > Set Password (from the File menu at the top of your screen), enter the requested information, then click Set Password.
If your computer isn’t set up for Touch ID, “Remember this password in my keychain” appears. You can select the checkbox to add the password to your keychain so you don’t have to type the password each time.
If your computer is set up for Touch ID, "Open with Touch ID” appears. You can select the checkbox to turn on Touch ID for the presentation.
Note: Adding a password to a presentation encrypts the file.
With the presentation open, do one of the following:
Change a password: Choose File > Change Password (from the File menu at the top of your screen). Enter the requested information, then click Change Password.
Remove a password: Choose File > Change Password. Type the old password, then click Remove Password.
Before you can use Touch ID to open password-protected presentations, you need to set it up on your computer.
To set up Touch ID, do both of the following:
Set up Touch ID for your Mac: Choose Apple menu > System Preferences, click Touch ID, click “Add a fingerprint,” then follow the onscreen instructions.
Note: If you don’t see Touch ID, this feature isn’t available on your Mac.
Set up Touch ID for Keynote: In Keynote, choose Keynote > Preferences (from the Keynote menu at the top of your screen), then select Use Touch ID.
Double-click the presentation, then place your finger on the right end of the Touch Bar at the top of your keyboard.
If you add a password to a presentation, or change an existing password, the password applies only to the version where the password was added or changed and to subsequent versions.
If the presentation is shared, to prevent others from restoring an unprotected version of the presentation or a version with an older password, stop sharing the presentation, add a unique password to it, then share the presentation again.
Note: You can also protect a presentation by requiring a separate password to stop or exit the presentation while it’s playing. This password requirement is useful, for example, when the presentation is set to play automatically in a kiosk.