How do you add or create line breaks in the text or between projects with a solid line?

The same way between posts on the forum here?

Thanks,
NMK

putting lines between posts is just a simple css rule. It does come down to what you're after though... For example:

1. #index ul.section { border-bottom: 1px solid #666; }

To enter a ruler line in the text area simply use the hr tag.

1. some text here
2. <hr />
3. separated from the html tag above

And of course you can style your hr tags. Search the web for more info about this...