Since you can underline any text in CSS like so:
h4 {
text-decoration: underline;
}
How can you also then edit the 'line' that is drawn, the color you get on the line is easily specified as color: red
but how does one edit the height of the line, i.e. the thickness?
Here is one way of achieving this :
HTML :
<h4>This is a heading</h4>
<h4><u>This is another heading</u></h4>
CSS :
u {
text-decoration: none;
border-bottom: 10px solid black;
}
Here is an example: http://jsfiddle.net/AQ9rL/