format comment section

I’m looking for where i would format the comment section below each blog post. When I’m logged in, the comment section is pretty well formatted but when logged out (as users would see the page), it is in need of proper formatting – to more closely match the view when I’m logged in. I am having trouble locating where to adjust the formatting for the comment section. I have a jpg of a screenshot of the two different views but can’t see here how to include the 2 jpgs for illustration.

I’m using a blank theme created from scratch in a web design class for WP.
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