This declaration corresponds to the
center environment. This
declaration can be used inside an environment such as
quote or in
parbox. The text of a figure or table can be centred on the
page by putting a
\centering command at the beginning of the
figure or table environment.
center environment, the
\centering command does
not start a new paragraph; it simply changes how LaTeX formats paragraph
units. To affect a paragraph unit's format, the scope of the
declaration must contain the blank line or
\end command (of an
environment like quote) that ends the paragraph unit.