This will set the spacing between the lines. It is the broadness / thickness of the line.
So each line will be set to the corresponding height.
It takes the following values.
a) cm : The line height can be set in centimeter as 1cm or 2cm etc ...
b) px : The line height can be set in pixels as 1px or 10px etc ...
c) pt : The line height can be set in points as 1pt or 10pt etc ...
d) % : The line height can be set in percent as 200% or 500% etc .... If 100% means original size.
Example 1:
<div style="background-color: lime; line-height: 1cm;">
testing line height - line 1 <br>
testing line height - line 2 <br>
</div>
Result:
testing line height - line 1
testing line height - line 2
Example 2:
<div style="background-color: lime; line-height: 80px;">testing line height<br> testing line height - line 2 <br>
</div>
Result:
testing line height
testing line height - line 2
Example 3:
<div style="background-color: lime; line-height: 20pt;">testing line height<br> testing line height - line 2 <br>
</div>
Result:
testing line height
testing line height - line 2
Example 4:
<div style="background-color: lime; line-height: 200%;">testing line height<br> testing line height - line 2 <br>
</div>
Result:
testing line height
testing line height - line 2
A Note
CSS - Cascading Style Sheets can be used along with html tags as explained in this site.
This simple CSS will help you to create much elegant and neat html web pages.
This does not need any additional softwares or codings.
All web browser are capable of handing CSS codes.
Note 2: If required you can using <span> instead of <div> tags.
div tag will start and end on new lines. span will not exceed the tag area.