How to Convert Existing Regular Note to Shared Note
If you want to change a regular Note you have created into a Shared Note, please do the following in the Note List screen.
▼Click the option_button.icon in the upper right corner of the Note list and select "Convert to Shared Note".
https://gyazo.com/fdf3c58457b32c9efa94253e96f1a48a
▼Select the Shared Range and click "Execute" to complete the process.
https://gyazo.com/6d08047156952a1bd4bf60e8aa3bc921
Note:
Shared Note" is a feature for teacher accounts only.
If you do not see the "Convert to Shared Note" item when you click the option_button.icon in the upper right corner of the Note list,
Please refer to the following page to check if the settings to start using Shared Notes have been made.
Reference