Paragraph style overrides
If you override the paragraph style of text within text frames on individual pages, such as changing the size of text in a text frame but not changing the size of its paragraph style, any changes you later make to the paragraph style are not applied to the overridden text.
You can reset the changes you made to revert individual pages back to the master page format. However, this removes all changes made to those pages.
Note
You cannot reset changes made to text in text frames on master pages.