In my emails, when I reply, I like to separate one email from another-when it's ongoing, with a 'horizontal line'. This is what it's called on other email sites. I cannot seem to find out how to 'insert' a horizontal line on this email system. So, as a makeshift 'horizontal line', I have to hold down the shift button while hitting this _ button repeatedly until I have a 'horizontal' line. PIA! Anyone can help? Thanks.