Hi rosemyriah,
The “article” area is set to float right and have a width of 71%. I think the theme design is to have the author box to the left of the content, but that doesn’t show on the wiki page.
I tried out some styling changes which works for the wiki pages, but might not work for your regular posts. Anyway, if you go to the Customizer, Additional CSS area, you can try this out. If it doesn’t work you can just delete it from the same place:
body:not(.search-results) article:not(.type-page) .entry-content {
float: left;
width: 95%;
}
body:not(.search-results) article:not(.type-page) .entry-content > blockquote {
margin-left: 0;
}
If that messes up you posts then the normal solution is create a template for the custom post type (wiki). Are you using a child theme? If so, here is something you can use as a starting point. You would unzip it and put the file in your child theme folder: https://cl.ly/1U3O0o422h0b
I took the single.php file from the theme, copied it to single-yada_wiki.php and pasted in the contents of the include file (content-single.php). Basically, what this codex article talks about: https://codex.www.ads-software.com/Post_Type_Templates
Twenty Sixteen is really nice for the contrast and easy readability.
Please let me know if you need more help.
Best regards,
David