normalboxd:1

Draws a double border around the given paragraph in L^ATEX and RTF. In HTML and XLP formats, horizontal rules are drawn before and after the text.

For example:

\normalboxd{This should be a boxed paragraph for highlighting important
information, such as information for registering a shareware program.}

gives:

This should be a boxed paragraph for highlighting important information,such as information for registering a shareware program.

See also normalboxnormalbox for single-bordered text.