On a Mac choose Preferences from the Notes menu and then click on Reset Password.The text below that option explains that this will allow you to create a new password for notes you lock from now on.

As before, if you are on an iPhone or iPad go to Settings > Notes > Password but this time choose Reset Password.But this method will change your password to a new one going forward while maintaining the old password for those notes you have already locked. If you have a particular note that you want to lock with an alternative password, perhaps because someone else knows your usual password, you can do so. How to add an additional password to Notes You’ll have to enter the old password and verify your new password. On a Mac choose Preferences from the Notes menu and then click on Change Password.On an iPhone or iPad go to Settings > Notes > Password and choose Change Password.You can change the Notes password at any time. The name of the note will be the first words in the note, so beware if this is what you are wanting to keep hidden. Locked notes will have a padlock icon beside them. Now if you attempt to open a locked note you will see a message that This note is locked.If you do opt for that and your Mac doesn’t have Touch ID it will default to the password. You’ll need to confirm whether or not you want to use that. If you have Face ID or Touch ID you can choose to use that as a way of unlocking the note.Do not forget it because you won’t be able to access the locked notes if you do. Note that this password will be used for every note you lock – unless you choose to set a new password as described below. You can set the password here, along with a hint just in case you might forget it. The first time you do this a Set Password page will appear.Find the option to Lock Note, tap on that.If you are starting a new note you will need to have started adding text to it before you move to the next step. Either open up the note you want to lock or start a new note.You can do this on you iPhone, iPad, or Mac, we’ll show you how to do it on each device. Here’s how to set up a password that can be used to lock and unlock individual Notes. How to add a password to Notes on iPhone/iPad

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