How to centre justify?

I was just wondering the same thing. Apparently not by any settings. But you can change the plugin css to do that. Then it will be always centered. In my opinion it looks better cetntered anyway. Just edit

twentytwenty/public/assets/css/twentytwenty.css

and add

margin-left: auto;
margin-right: auto;

into the .twentytwenty-container {} part. Hope this helps.

how would I left justify with a 10px pading on the rights?