This is perhaps not a *buntu question per se but I get no answers from the LibreOffice forums, so I'll give it a try here as well.

I have a Word template used at work which I want to transfer to LibreOffice. The headings in the Word template have double lines underneath all headings which is applied across the whole paragraph/page. In LibreOffice I modify the style for headings and can choose Font Effects - Underlining - Double which give similar small lines, but only under the actual words, not going across the whole page. If I instead use the choice Borders I can get the double line across the page, but it seems the lines can not be smaller than 0,25pt? That is way too thick for this template. It is certainly possible as the underlining choice have the correct thin lines, but why can't borders be done smaller than 0,25pt? Or can they?