Not all toolbar functions override styles in a style sheet.
If you select a word or phrase that has a Normal style and
click the Bold button, then you have instituted an inline style.
If you select several paragraphs and click the Numbered List
button, you are not applying an inline style. Rather, you are
instructing RH to create an OL list with several LI items. The
actual style used for that list (and list items) will follow the
style for OL in your style sheet, or use the HTML default if there
is none.
You can also create "interim" styling by adding some CSS
styles in individual topics (within the HEAD section).
Remember, CSS means Cascading Style Sheets. That is,
Topic inline styles override:
Topic HEAD styles, which override:
External style sheet styles.
Good luck,
Leon