Adding a sub domain
First locate the Sub domains icon on the control panel and click on it.
The following screen will then load
You then have to fill in the text box with the sub domain. You can then click the Add button. You will then be told if the sub domain creation was successful.
If you then FTP in to your site and click on the Public_html folder you will notice that you have a directory/folder named the same as the sub domain you created. This directory is where the sub domain will be directed to.