How do I insert a line in a text box

[Helen V]

Trying to insert a line in text box. I want to place this line above text
but I want to center the line. The line is to be slightly longer than the
text that appears below it. There is to be a space between this line and the
text.

 

[Suzanne S. Barnhill]

You can't insert a drawing line *in* a text box, which is also a drawing
object. If this is an assignment, you may be supposed to insert a top
paragraph border. You can control the distance from text using the Options
in the Format | Borders and Shading dialog.