Alignment
Layouts can change when screen resolutions change. The alignment classes help you position your text based on viewport size.
Examples
edit

<p class="text-xs-left">...</p>
<p class="text-xs-center">...</p>
<p class="text-xs-right">...</p>
 
 
<p class="text-xs-left">...</p>
<p class="text-sm-left">...</p>
<p class="text-md-left">...</p>
<p class="text-lg-left">...</p>
<p class="text-xl-right">...</p>
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