You may not want to use all of the headings available in HTML. If you don't want to
create a heading of a certain size, you can simply click the "Off" button for that heading
level. You can also turn all headings on or off with the appropriate button. Since the
browser has control over how it displays headings, you may wish to turn all of them off
to make the Web page more WYSIWYG.

Lists Category

HTML supports ordered (numbered) and unordered (bullet) lists. Ordered lists are
displayed starting either with letters, numbers, or roman numerals. Web browsers have
the annoying tendency to indent lists, which means that text converted to lists won't
look the same as the original document. They also use a specific font and size for the
list numbers, so you may wish to avoid using lists to more accurately preserve the look
of your document. To prevent creation of all lists, click the "All Off" button.