Why isn't the Horizontal Line formatting properly?

Okay, after a long day of fixing LibreOffice 6.04 back to my preferences, I go into one of my documents that I’ve been using horizontal lines… I try to do the usual single dash (-) horizontal line… but it wouldn’t format after I put in the three I needed… or… any amount I gave… I tried with the actual dash (*) horizontal line… still nothing.
I don’t have the ‘Style and Formatting’ option anymore, so I don’t know what I can do to fix it.
If anyone does, please help me.



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HTH - Regards