# AppThemes An AppTheme is a group of razor templates to render content on a display or admin page. You do not need to know razor to build an AppTheme. Rocket AppThemes use a standard format to help. **If you do not know HTML or CSS, you should learn that before trying to build your own AppTheme.** ## DNN AppTheme Folders All AppThemes are stored within the DNN filesystem. ``` \DesktopModules\RocketThemes\#AppThemeProjectName#\#systemkey#.#AppThemeName#\#version# ``` ### All AppThemes ``` \DesktopModules\RocketThemes ``` ### AppTheme Project Folder Each AppTheme Project is kept in GitHub. The Repository name is the AppTheme project name. *Example: AppThemes-W3-CSS* ``` \DesktopModules\RocketThemes\AppThemes-W3-CSS ``` ### Folder Structure Each AppTheme has a name prefix matching the system it is created for. The direct sub-folder is the version, the "default" folder beneath the version is for the razor templates. Other folders are optional depending on what files exist in the AppTheme. *Example: rocketcontentapi.HeroHeader* ``` rocketcontentapi.HeroHeader >1.0 >css >default >dep >img >js >rex ```