Barbara asked for a FOOTER separator, not a FOOTNOTE separator. (Although,
she might've used the wrong term by accident.)
Barbara, I usually select the first line of my footer and just click the
"Top Border" button on the formatting toolbar. If you don't like the amount
of white space between the line and the footer text, go into Format > Borders
and Shading. Click on the Borders tab and click on the Options button at the
lower right corner of the dialog box. You also can select different line
styles/colors in this dialog box.
To increase the space ABOVE the border line, click on the first line of
footer text and use Format > Paragraph and increase the space before the
paragraph.
Hope this helps.
Ann