[[email protected]]

I have a very large document, about fifty pages, that was made without
styles. It contains articles and sections and subsection, like:

Article I: Title
Section 1.01. Content...
Subsection 1.01.a

I would like to know if it's possible to highlight the whole document
and apply a style to it, whereby the style would recognize the nested
nature of the document. I don't want to have to go through to each
paragraph and apply the proper formatting style for each section and
subsection.

Thank you.