We’re not sure what you mean by frontend in editor? If you mean that you are creating a page and using visual tab, we discourage that because you have a page builder for that. If you mean in post, then it could be that the default blockquote isn’t set. But that can be fixed with css.
Blockquote font can be changed in css – in the-creator.css on line 884.
The post font size can be changed in style.css on line 2146
.post_content .postmeta_under_image p {
padding: 0;
}
Just add font size that you need.