The Book of Forgotten Styles: a small list of WordPress generated classes that we tend to shamefully ignore

Post, Pages and Custom Post Types

.more-link: The Continue reading link
.post-edit-link

Archive, Blog and Search

Pagination links

Images

.wp-caption-text

Comments section

Pagination links
.logged-in-as
.must-log-in: When the user has to login in to comment
.reply: The wrapper <div>
- .comment-reply-link: The reply link
- .comment-reply-login: When the user has to login in to comment
.comment-notes
- #email-notes
.form-allowed-tags: The allowed HTML tags that appear right before the Submit button. Uses comment_form()

Comment list

.bypostauthor: A comment by the post author
.byuser: A comment by a logged user
.comment-author-admin: A comment by one of the logged admins

Gallery

.gallery /* The Gallery container (div) */
.gallery .gallery-item /* A Gallery item container, for 3, 2 and 4 column galleries */
.gallery-columns-2 .gallery-item
.gallery-columns-4 .gallery-item
.gallery img /* The actual image inside a container for 3, 2 and 4 column galleries */
.gallery-columns-2 .attachment-medium
.gallery-columns-4 .attachment-thumbnail
.gallery .gallery-caption /* A gallery image caption */
.gallery dl, .gallery dt /* Definition lists elements */
.gallery br+br /* Pick the second line break if two line breaks are adjacent */