Naming an alert

Its a while since I have used alerts during my runs but I am currently training for a marathon and set them up again the other day. Every 20 mins to remind me to eat and every 21.1km to tell me I've run a half marathon.

When I used them before I could name the alerts, such as the every 20 mins was named 'eat' and 21.1 'HM'. Now you can't.

Has this feature been removed? Thanks