- Go to Contacts → Contact Listing
- On per row of the contact grid → click on the view sub-grid icon

- Enter the title, note → click Add Note
- On per row of the contact grid → click on the details icon

- Navigate to the Notes tab

- Click the Create button
- Enter the title, note → click Create
- On the note grid → click on the edit icon if you wanna edit the note

- Enter the title, note → click Save