Tap the 'Lock Note' option in the bottom row. Inside the note, tap on the top right of the screen to bring up the share menu.Otherwise, tap on the bottom right of the app to create a new Note, and enter any private information you wish to hide. Once inside Notes, if you've already got a particular note in mind to protect, skip to the next step.There are just a few more steps to go through to fully protect a note of your choice from prying eyes. To test out the new password and Touch ID features of Notes, head over to the Notes app on your iPhone or iPad. Tap 'Done' in the top right corner to confirm your selections.

In the same menu, toggle on 'Use Touch ID.'.

Provide a hint to the password you entered to ensure that if you ever forget it you can be guided back through guessing.

Fill out the fields requiring the Notes password (remember that something other than your iPhone passcode will be preferable), and then verify the password in the next field.

If this is your first time setting it up, a menu will immediately appear asking to set up the new password.

Midway down the screen will be a 'Password' option.

Navigate to the Settings app on your iPhone or iPad.

The steps needed to set up a password or Touch ID for your Notes are straight-forward and should only take a few moments to complete. With some people even using Notes to store passwords for various sites and services, Apple's security-enhanced update is well worth checking out. The feature allows users to prevent access to sensitive information on a case-by-case basis (some notes, like a shopping list, might not be as high risk), just in case someone gets past the lock screen security of the iPhone itself. In iOS 9.3, Apple has improved the functionality of its first-party Notes app with the ability to add password or Touch ID security for individual notes.

Although more prominent features like Night Shift and a few new Quick Actions are getting the spotlight with the launch of iOS 9.3, one new lesser-known update is definitely worth checking out.

How to undo in notes mac ios