You can choose a new styleChoose_style.tex for any Scientific Notebook document or you can change the appearance of the current styleTag_appearance.tex, either for the current working session or for all documents using the style.
Note: Choosing a different style for a document that is not a Scientific Notebook file can have unpredictable results and isn't recommended.
itbpF38.875pt24.5pt6ptindex.wmfindex.texStyleIndex.tex#Style