When an admin, event owner, or event editor modifies item notes on the Setup tab of an event that is not in a draft status, a modification notification will be sent to all Sub-Admins who have items on that event in their approval area, as well as all Admins (based on location permissions).
The item note modification will also be reflected in the event history.
Users who have enabled the email notification for Event Setup Notes Modified within their Profile icon > Profile > Notification Preferences will also receive an email notification for any item notes modifications. To enable email notifications, go to the top right of your dashboard, click on the person icon drop-down menu, as shown below, select Profile and Notification Preferences.
Then scroll down the page until you come to Event Setup Notes Modified, and toggle that notification on and SAVE.
The email notification will include the Event Details, Item(s) Requested (Spaces, Resources, Services) and Event History (see below).