---for paragraph spacing, you can use this tag <p> :
(the outline will be like there is empty line after each filled line like this:
--------------
1
23
456
and so on)
-----------------
here's the code:
<html>
<head>
<title>document title</title>
</head>
<body>
<p>1</p>
<p>23</p>
<p>456</p>
<p>78910</p>
</body>
</html>
the end of code.
.
.
.
for layout without paragraph format, just use <br> instead of <p>
(you can use <p> tag on the first line and ended with </p> for more neat layout :
<html><head><title>document title</title></head>
<body>
<p>1
<br>23
<br>456
<br>78910</p>
</body></html>
the end of code.
the result will be like this:
1
23
456
78910
.
.
.
the <p>and</p> tags are to separate the lines above from other line txt.
like this:
===================
---this another text/paragraph
1
23
456
78910
---this is another text/paragraph
====================