Thanks for the clarification…unfortunately, this theme wasn’t coded to show that on the blog home page (where post summaries are displayed. However, it does show when the full post (article) is viewed.
You could add the author (and/or other meta info) to the summary, but this would require some coding to be done.
You’re welcome… but to give insight on coding it in, it’s actually not that easy and would require some coding effort. For this theme, I wanted to keep the blog summaries with the least amount of information to give it a cleaner front-end.