Email watch / reminder

Email watch / reminder



I am trying to set up an email watch/reminder so that if someone does not respond to my email then I get a reminder 7 days later.


I found the following  https://www.zoho.eu/mail/help/follow-up-emails.html


All good until I get to Step 5  

Click the Clock icon to watch the email.

I do not have the clock Icon?

Am I missing something obvious?