Title: Theme | Page 6 of 8 | Developer.WordPress.org --- # @package: Theme * function[get_header_image_tag()](https://developer.wordpress.org/reference/functions/get_header_image_tag/) * Creates image tag markup for a custom header image. * Used by [2 functions](https://developer.wordpress.org/reference/functions/get_header_image_tag/#used-by) | Uses [9 functions](https://developer.wordpress.org/reference/functions/get_header_image_tag/#uses) | Source: [wp-includes/theme.php:1270](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1270-L1374) * hook[get_header_image_tag](https://developer.wordpress.org/reference/hooks/get_header_image_tag/) * Filters the markup of header images. * Used by [1 function](https://developer.wordpress.org/reference/hooks/get_header_image_tag/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/get_header_image_tag/#uses) | Source: [wp-includes/theme.php:1373](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1373-L1373) * function[the_header_image_tag()](https://developer.wordpress.org/reference/functions/the_header_image_tag/) * Displays the image markup for a custom header image. * Used by [0 functions](https://developer.wordpress.org/reference/functions/the_header_image_tag/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/the_header_image_tag/#uses) | Source: [wp-includes/theme.php:1383](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1383-L1385) * hook[editor_stylesheets](https://developer.wordpress.org/reference/hooks/editor_stylesheets/) * Filters the array of URLs of stylesheets applied to the editor. * Used by [1 function](https://developer.wordpress.org/reference/hooks/editor_stylesheets/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/editor_stylesheets/#uses) | Source: [wp-includes/theme.php:2283](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L2283-L2283) * function[has_header_image()](https://developer.wordpress.org/reference/functions/has_header_image/) * Checks whether a header image is set or not. * Used by [1 function](https://developer.wordpress.org/reference/functions/has_header_image/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/has_header_image/#uses) | Source: [wp-includes/theme.php:1222](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1222-L1224) * function[is_customize_preview()](https://developer.wordpress.org/reference/functions/is_customize_preview/) * Whether the site is being previewed in the Customizer. * Used by [12 functions](https://developer.wordpress.org/reference/functions/is_customize_preview/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/is_customize_preview/#uses) | Source: [wp-includes/theme.php:3842](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3842-L3846) * function[get_editor_stylesheets()](https://developer.wordpress.org/reference/functions/get_editor_stylesheets/) * Retrieves any registered editor stylesheet URLs. * Used by [1 function](https://developer.wordpress.org/reference/functions/get_editor_stylesheets/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/get_editor_stylesheets/#uses) | Source: [wp-includes/theme.php:2239](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L2239-L2284) * function[wp_customize_url()](https://developer.wordpress.org/reference/functions/wp_customize_url/) * Returns a URL to load the Customizer. * Used by [7 functions](https://developer.wordpress.org/reference/functions/wp_customize_url/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/wp_customize_url/#uses) | Source: [wp-includes/theme.php:3783](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3783-L3789) * function[wp_customize_support_script()](https://developer.wordpress.org/reference/functions/wp_customize_support_script/) * Prints a script to check whether or not the Customizer is supported, and apply either the no-customize-support or customize-support class to the body. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_customize_support_script/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/wp_customize_support_script/#uses) | Source: [wp-includes/theme.php:3808](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3808-L3831) * function[_delete_attachment_theme_mod()](https://developer.wordpress.org/reference/functions/_delete_attachment_theme_mod/) * Checks an attachment being deleted to see if it’s a header or background image. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_delete_attachment_theme_mod/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/_delete_attachment_theme_mod/#uses) | Source: [wp-includes/theme.php:3455](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3455-L3479) * function[add_editor_style()](https://developer.wordpress.org/reference/functions/add_editor_style/) * Adds callback for custom TinyMCE editor stylesheets. * Used by [0 functions](https://developer.wordpress.org/reference/functions/add_editor_style/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/add_editor_style/#uses) | Source: [wp-includes/theme.php:2194](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L2194-L2208) * function[check_theme_switched()](https://developer.wordpress.org/reference/functions/check_theme_switched/) * Checks if a theme has been changed and runs ‘after_switch_theme’ hook on the next WP load. * Used by [0 functions](https://developer.wordpress.org/reference/functions/check_theme_switched/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/check_theme_switched/#uses) | Source: [wp-includes/theme.php:3488](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3488-L3526) * function[remove_editor_styles()](https://developer.wordpress.org/reference/functions/remove_editor_styles/) * Removes all visual editor stylesheets. * Used by [0 functions](https://developer.wordpress.org/reference/functions/remove_editor_styles/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/remove_editor_styles/#uses) | Source: [wp-includes/theme.php:2219](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L2219-L2228) * hook[after_switch_theme](https://developer.wordpress.org/reference/hooks/after_switch_theme/) * Fires on the next WP load after the theme has been switched. * Used by [1 function](https://developer.wordpress.org/reference/hooks/after_switch_theme/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/after_switch_theme/#uses) | Source: [wp-includes/theme.php:3516](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3516-L3516) * function[add_theme_support()](https://developer.wordpress.org/reference/functions/add_theme_support/) * Registers theme support for a given feature. * Used by [12 functions](https://developer.wordpress.org/reference/functions/add_theme_support/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/add_theme_support/#uses) | Source: [wp-includes/theme.php:2702](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L2702-L2952) * function[_wp_customize_include()](https://developer.wordpress.org/reference/functions/_wp_customize_include/) * Includes and instantiates the WP_Customize_Manager class. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_wp_customize_include/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/_wp_customize_include/#uses) | Source: [wp-includes/theme.php:3541](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3541-L3638) * function[_custom_header_background_just_in_time()](https://developer.wordpress.org/reference/functions/_custom_header_background_just_in_time/) * Registers the internal custom header and background routines. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_custom_header_background_just_in_time/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/_custom_header_background_just_in_time/#uses) | Source: [wp-includes/theme.php:2963](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L2963-L2993) * function[_wp_customize_loader_settings()](https://developer.wordpress.org/reference/functions/_wp_customize_loader_settings/) * Adds settings for the customize-loader script. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_wp_customize_loader_settings/#used-by) | Uses [8 functions](https://developer.wordpress.org/reference/functions/_wp_customize_loader_settings/#uses) | Source: [wp-includes/theme.php:3743](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3743-L3772) * function[get_theme_support()](https://developer.wordpress.org/reference/functions/get_theme_support/) * Gets the theme support arguments passed when registering that support. * Used by [43 functions](https://developer.wordpress.org/reference/functions/get_theme_support/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/get_theme_support/#uses) | Source: [wp-includes/theme.php:3042](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3042-L3065) * function[remove_theme_support()](https://developer.wordpress.org/reference/functions/remove_theme_support/) * Allows a theme to de-register its support of a certain feature * Used by [2 functions](https://developer.wordpress.org/reference/functions/remove_theme_support/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/remove_theme_support/#uses) | Source: [wp-includes/theme.php:3081](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3081-L3088) * function[_remove_theme_support()](https://developer.wordpress.org/reference/functions/_remove_theme_support/) * Do not use. Removes theme support internally without knowledge of those not used by themes directly. * Used by [3 functions](https://developer.wordpress.org/reference/functions/_remove_theme_support/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/_remove_theme_support/#uses) | Source: [wp-includes/theme.php:3104](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3104-L3151) * function[background_image()](https://developer.wordpress.org/reference/functions/background_image/) * Displays background image path. * Used by [0 functions](https://developer.wordpress.org/reference/functions/background_image/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/background_image/#uses) | Source: [wp-includes/theme.php:1856](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1856-L1858) * function[current_theme_supports()](https://developer.wordpress.org/reference/functions/current_theme_supports/) * Checks a theme’s support for a given feature. * Used by [96 functions](https://developer.wordpress.org/reference/functions/current_theme_supports/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/current_theme_supports/#uses) | Source: [wp-includes/theme.php:3172](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3172-L3233) * function[get_background_color()](https://developer.wordpress.org/reference/functions/get_background_color/) * Retrieves value for custom background color. * Used by [4 functions](https://developer.wordpress.org/reference/functions/get_background_color/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/get_background_color/#uses) | Source: [wp-includes/theme.php:1867](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1867-L1869) * hook[current_theme_supports-{$feature}](https://developer.wordpress.org/reference/hooks/current_theme_supports-feature/) * Filters whether the active theme supports a specific feature. * Used by [1 function](https://developer.wordpress.org/reference/hooks/current_theme_supports-feature/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/current_theme_supports-feature/#uses) | Source: [wp-includes/theme.php:3232](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3232-L3232) * function[background_color()](https://developer.wordpress.org/reference/functions/background_color/) * Displays background color value. * Used by [0 functions](https://developer.wordpress.org/reference/functions/background_color/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/background_color/#uses) | Source: [wp-includes/theme.php:1876](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1876-L1878) * function[require_if_theme_supports()](https://developer.wordpress.org/reference/functions/require_if_theme_supports/) * Checks a theme’s support for a given feature before loading the functions which implement it. * Used by [0 functions](https://developer.wordpress.org/reference/functions/require_if_theme_supports/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/require_if_theme_supports/#uses) | Source: [wp-includes/theme.php:3245](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L3245-L3251) * function[_custom_background_cb()](https://developer.wordpress.org/reference/functions/_custom_background_cb/) * Default custom background callback. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_custom_background_cb/#used-by) | Uses [9 functions](https://developer.wordpress.org/reference/functions/_custom_background_cb/#uses) | Source: [wp-includes/theme.php:1885](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1885-L1961) * hook[theme_mod_{$name}](https://developer.wordpress.org/reference/hooks/theme_mod_name/) * Filters the theme modification, or ‘theme_mod’, value. * Used by [1 function](https://developer.wordpress.org/reference/hooks/theme_mod_name/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/theme_mod_name/#uses) | Source: [wp-includes/theme.php:1082](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1082-L1082) * function[is_random_header_image()](https://developer.wordpress.org/reference/functions/is_random_header_image/) * Checks if random header image is in use. * Used by [4 functions](https://developer.wordpress.org/reference/functions/is_random_header_image/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/is_random_header_image/#uses) | Source: [wp-includes/theme.php:1470](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/theme.php#L1470-L1491) [Previous Page](https://developer.wordpress.org/reference/package/theme/page/5/?output_format=md) [1](https://developer.wordpress.org/reference/package/theme/?output_format=md) … [4](https://developer.wordpress.org/reference/package/theme/page/4/?output_format=md) [5](https://developer.wordpress.org/reference/package/theme/page/5/?output_format=md) 6 [7](https://developer.wordpress.org/reference/package/theme/page/7/?output_format=md) [8](https://developer.wordpress.org/reference/package/theme/page/8/?output_format=md) [Next Page](https://developer.wordpress.org/reference/package/theme/page/7/?output_format=md)