Do one of the following:
From the notes list or gallery view: Control-click the note you want to share with others, then choose Share Note. You can also swipe left on a note using two fingers on the trackpad (one finger on the Magic Mouse), then click below Collaborate, then choose the following options:
Who can access: Choose who can view the note (only people you invite, or anyone with the link).
Permissions: Choose whether people can make changes or only view the note.
If you allow only invited people to view and edit the note, select “Allow others to invite” to let the people you share with add other participants.
Select how you want to share the note, such as Messages, Mail, or AirDrop.
People and groups you’ve had recent Messages conversations with are listed at the top. Click one to share the note with them in Messages.
Tip: If you share the note in Messages, you get updates in the Messages conversation whenever someone makes a change to the shared note.
Control-click the folder you want to share with others, then choose Share Folder.
To share a folder, you can also click Send a note using other apps.