To text align all yuo have to do this:
<style>
.yournameforclass {
background: #fff; //which does not have to be there
text-align: center;
width: 100%; //all of this can be varied. Text align can be used in these forms: left, which is to the left, right, to the right of the screen
height: 300px;
}<!-- use the center tag -->
<center>
<!-- your code -->
</center> <html>
<head>
<style>
h1 {text-align: center;}
p {text-align:
center;}
</style>
</head>
<body>
<h1>This is a
heading</h1>
<p>This is a paragraph.</p>
</body>
</html>
<center></center><center>Dieser Text wird zentriert.
<p>Ebenso dieser Paragraph.</p></center>
<div style="text-align:center">Dieser Text wird zentriert.
<p>Ebenso dieser Paragraph.</p></div>