Globally change indented paragraphs

[Stephen]

Hi,

I don't know what styles are? I can't apply one paragraph
to a "style" and globally replace all the paragraphs to
that style?

Basically what I'm asking is if I am out of luck, that
there is no why to globally replace formats, even though
the indentations are all the same, if I haven't done that
style?

Thanks,

Stephen