The theme of the website sets the style of the website including colors, font families, font sizes, widths and heights, borders, the look and feel of the navigational elements including page menus and background colors/images on the website.

Themes can be modified in the following ways:

1. Select a Different Theme -- Themes can be changed in a website much like switching the faceplate on a cell phone, it does not affect the content, only the presentation, and it can be reversed at any time except with custom themes. See: Select a Different Theme
2. Adjust the Current Theme -- Backgrounds, colors, and column widths can be adjusted via overrides from the Appearance / Change Background screen. See: Adjust the Current Theme
3. Create a Custom Theme -- More advanced changes may be made by creating a custom theme from the existing theme. Doing this, however, requires knowledge of CSS. See: Create a Custom Theme