parbox is a box whose contents are created in
\parbox has two mandatory arguments:
width - specifies the width of the parbox, and
text - the text that goes inside the parbox.
LaTeX will position a
parbox so its center lines up with the
center of the text line. An optional first argument,
allows you to line up either the top or bottom line in the parbox.
\parbox command is used for a parbox containing a small piece
of text, with nothing fancy inside. In particular, you shouldn't use
any of the paragraph-making environments inside a
argument. For larger pieces of text, including ones containing a
paragraph-making environment, you should use a