When creating pages (or newsletters, emails, etc), you can use the "FORMAT" Pull down menu within the Content Editor and the following "rules":
HEADING 1 - for any main page titles or main sections within a page
HEADING 2 (&3) - for sub headings (or subsections) on a page
HEADING 4 - to highlight a special tip or resource i have on a webpage that i want to be sure folks don't miss
HEADING 5 - Perhaps you don't really use this one as it just becomes too small...
There is rarely a need to change the "Font family" or the "Font Size". You can do everything using the pre-formated headings to be sure everything is consistent from page to page to page.