Paul
4th row down you will see the tab for Alerts
Tick what you want alerted on, registration, type etc add the modes code, registration, type flight ID etc in the box below where you ticked. For type use the ICAO code
Tick Show a Notification Message, email alerts are not working
When an aircraft you wanted alerted on comes into your MyFlights coverage an alert message will pop up bottom right corner of the screen
Alan