In some papers the chapters or their equivalents are divided
into sections, which may in turn be divided into subsections,
and these into sub- subsections, and so on. Such divisions are
customarily given titles, called subheadings, which are
designated respectively first-, second-, and third-level
subheadings and differentiated from one another by typing style.
The style of subheading with the greatest attention value should
be given to the principal, or first-level, subdivision. On a
type written page centered headings have greater attention value
than side headings, and underlined headings, centered or side,
have greater attention value than those not underlined. A plan
for the display of five levels of subheadings in a typed paper
follows:  First-level, centered heading, underlined:
Traditional Controversy between Medieval Church and State
Second-level, centered heading, not underlined:  Reappearance of
Religious Legalism  Third-level, side heading underlined,
beginning at the left margin:  Jesus and Pau