I have a WordPress website, developed by someone else. I need to make some changes and fix some issues, as the site still has some flaws. For example, there are some fields that need to be changed, but in WP I can't see anything when I try to edit that page/post. Probably there is something custom in the template files of the used Theme. But I can't figure out which CSS or PHP file to check.
Is there a plugin or another way that can help me find out the underlying files of a page/post?
Thanks in advance!