You can format comments in the same way you can format posts - through html and markup. I did a post on formatting and the value of it here, if you'd like to know more, it's a bit long to put in a comment! https://steemit.com/writing/@spookypooky/format-it-or-forget-it-2-minute-read (it also link to resources that might let you edit and preview your content, it's tremendously useful!)
You can format comments in the same way you can format posts - through html and markup. I did a post on formatting and the value of it here, if you'd like to know more, it's a bit long to put in a comment! https://steemit.com/writing/@spookypooky/format-it-or-forget-it-2-minute-read (it also link to resources that might let you edit and preview your content, it's tremendously useful!)