This article applies to SiteFusion packages.
When you first set-up your site using the SiteFusion Wizard you will have selected a template upon which the site you have begun to build is now based.
You can change your template but in doing so you may lose any customised layout changes, etc to your site. You should therefore consider carefully before changing templates.
Your template also forms part of a theme. Some themes have more than one template, making it easier to switch the look of your design without losing too many of your amendments. However, if you change the Theme you will lose all customisations to your site and you are unable to retrieve any information lost. Before you change your theme you will be reminded of the impact of doing so.