Here's a couple of screenshots to clarify the question. WYS may well be WYG, but it's not What You Asked For <g> 1. shows the selection buttons before I click on "top border", 2. shows how Word enthusiastically reinterprets this as "all borders". The second screenshot (touched up with a graphics editor) shows the top border effect I'm trying for.

Hi
The only way to achieve this is to insert a continuous Section Break both before and after the heading.
Then apply a top border to the paragraph.
Then reduce the margin in that Section only to the width of the paragraph.
Hope this helps.
Good luck.
Tony

Well, that's certainly an interesting idea! but not one I'll be putting to the test. I'll just add another entry to the "Word knows better" list ;-}

Hi

The other option you have is to just "draw" a line over each heading as required. This is achieved by using Insert - Shapes - Lines and the draw a line where you want it.

Hope this helps.

Tony