Here’s a quick trick for adding a little panache to your document. It’s a trick that works in Word, OpenOffice, or LibreOffice. To add a straight line, type three or more dashes and press enter.
Want a double line? Try three equal signs and hit the enter key.
For a thicker double line hit three # signs.
In Word, if you hit three asterisks, you’ll get a broken line like this.
In LibreOffice and OpenOffice, it will just give you a medium thickness double-line