How to set up several "From" addresses?

How to set up several "From" addresses?

Hi,

I was wondering how I can set up several e-mail addresses for using in the "From" field while composing a new message. In the FAQ it is described in https://zohomail.wiki.zoho.com/FAQs.html#customize from address, but unfortunately this does not work. In the second point it ist described to click on "Account Details" > "Add another email address" - Am I the only one, but I can not see either one of this labels... so I also can not click on them :-)

So, how can I set up this? Would be very nice to do this and the From-field is even a selectbox, so it should be possible.

Cheers,
Dirk