Where's the Reply Feature?

I have been sitting outside on the deck with the laptop, searching in vain for something that should be easy! So if anyone in Blogger land knows this answer easily, please do share. I can't seem to find where I can add the "reply to comments" feature on my posts! I've tried a few things and there doesn't seem to be an obvious option. I've also looked in the Help feature, which is a joke and has been quite silly many times before when I've used that ridiculous feature.

I would like to be able to respond to comments easily, but hey, if I can't figure it out (pretty likely), then life will go on! :0

Thanks in advance for all you smartypants smartykins who know everything....well, some things anyway. :)