add_theme_support()

add_theme_support() — Registers theme support for a given feature. Must be called in the theme’s functions.php file to work. If attached to a hook, it must be {

Inputs: $feature (string): The feature being added. Likely core values include: ‘admin-bar’ ‘align-wide’ ‘appearance-tools’ ‘automatic-feed-links’ ‘block-templates’ ‘block-template-parts’ ‘border’ ‘core-block-patterns’ ‘custom-background’ ‘custom-header’ ‘custom-line-height’ ‘custom-logo’ ‘customize-selective-refresh-widgets’ ‘custom-spacing’ ‘custom-units’ ‘dark-editor-style’ ‘disable-custom-colors’ ‘disable-custom-font-sizes’ ‘disable-custom-gradients’ ‘disable-layout-styles’ ‘editor-color-palette’ ‘editor-gradient-presets’ ‘editor-font-sizes’ ‘editor-spacing-sizes’ ‘editor-styles’ ‘featured-content’ ‘html5’ ‘link-color’ ‘menus’ ‘post-formats’ ‘post-thumbnails’ ‘responsive-embeds’ ‘starter-content’ ‘title-tag’ ‘widgets’ ‘widgets-block-editor’ ‘wp-block-styles’

Returns void|false: Void on success, false on failure.