Setting preferences allows you to customize the look of your store with the use of a variety of preset templates. To use a template, click on the radio button beside the template you would like to use, and click "apply". You can change the template any time you like by returning to the preferences interface and applying a different template.
If you would like to have more control over the color scheme used in your store, or if you have a store from an older version of ESM Pro and want to preserve the look of your storefront, select the first template (top-left corner of the list), and click "apply". When you have enabled it, you will be taken to a preferences screen which will allow you to define a custom color scheme.