Narratium modifies the “title” field in the post editing page with a new, more advanced field that allows you to add text formatting to any post title, at the same time adds a new “subtitle” field to add headlines or subtitles to each post, also with the particularity of being able to format text to that field.

The new title field does not remove or modify the default title field of WordPress, but modifies its value while saving a version of the formatted title. In this way the post will always have in the database an unformatted title as usual and also a formatted title that will be displayed in the spaces in which it is enabled. In this way, when you change the theme, the normal unformatted title will appear in each of the posts.