What is a Child ThemeA WordPress child theme is a theme that inherits thefunctionality of another theme, called the parent theme, andallows you to modify, or add to, the functionality of thatparent theme.Source: http://codex.wordpress.org/Child_Themes
Why use a Child Theme?Child themes are the recommended way of makingmodifications to a theme.
Child Theme File Structure?WordPress Child Themes are located in /wp-content/themes/like any other WordPress Theme.
Child Theme File Structure?They’re activated from the WordPress admin like any othertheme.
Child Theme File Structure?Child Themes always have a style.css file and may ofteninclude a functions.php file.
The Child Theme CSS Filestyle.css is the only file required for a child theme.
The Child Theme CSS File/*Theme Name: Twenty Ten 1.2 Child ThemeURI: http://wordpressannarbor.com/Description: Child theme for the Twenty Ten by WordPressAuthor: Declan ONeillAuthor URI: http://wordpressannarbor.com/Template: twentytenVersion: 1.0*/
The Child Theme CSS FileTheme Name: Twenty Ten 1.2 Child Theme[Required]
The Child Theme CSS FileTheme URI: Webpage[Optional]
The Child Theme CSS FileDescription: Child theme for the Twenty Ten by WordPress[Optional]
The Child Theme CSS FileAuthor URI: Author Webpage.[Optional]
The Child Theme CSS FileAuthor: Author name.[Optional]
The Child Theme CSS FileTemplate: Directory name of parent theme. Case-sensitive.[Required]