WordPress at a glance
action is not described

admin_print_scripts action-hook . WP 2.1.0

Fires when scripts are printed for all admin pages.

Usage

add_action( 'admin_print_scripts', 'action_function_name_3497' );
function action_function_name_3497(){
	// action...
}

Where the hook is called

In file: /wp-admin/admin-header.php
admin_print_scripts
wp-admin/admin-header.php 132
do_action( 'admin_print_scripts' );
wp-includes/class-wp-customize-widgets.php 663
do_action( 'admin_print_scripts' );
wp-admin/includes/template.php 1935
do_action( 'admin_print_scripts' );
wp-admin/includes/media.php 528
do_action( 'admin_print_scripts' );

Where the hook is used (in WP core)

wp-admin/edit-form-blocks.php 33
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
wp-includes/default-filters.php 344
add_action( 'admin_print_scripts', 'print_emoji_detection_script' );
wp-includes/default-filters.php 345
add_action( 'admin_print_scripts', 'print_head_scripts', 20 );