Horizontal double lines

[Alan Cliffe]

I have a Writer document in which I marked off separations between passages 
with asterisks. Somehow the lines of asterisks turned into horizontal double 
lines across the page, the top line thicker than the bottom, and I cannot 
delete them. I have tried copying and pasting text from the document into a new 
document, without copying the lines, but they just reappear in the new 
document. I'd appreciate someone's help on this one.