Tips on Customizing Chief Editor

How to Hide Chief Editor Admin Menus

function plt_hide_chief_editor_menus() {
	//Hide "Settings → Chief Editor".
	remove_submenu_page('options-general.php', 'chief_editor_single_options');
	//Hide "Chief Editor".
	remove_menu_page('chief-editor-dashboard');

	//Hide "PRINT Posts".
	remove_menu_page('edit.php?post_type=ce_pre_desktop_pub');
	//Hide "PRINT Posts → PRINT Posts".
	remove_submenu_page('edit.php?post_type=ce_pre_desktop_pub', 'edit.php?post_type=ce_pre_desktop_pub');
	//Hide "PRINT Posts → Add New".
	remove_submenu_page('edit.php?post_type=ce_pre_desktop_pub', 'post-new.php?post_type=ce_pre_desktop_pub');
	//Hide "PRINT Posts → Categories".
	remove_submenu_page('edit.php?post_type=ce_pre_desktop_pub', 'edit-tags.php?taxonomy=category&post_type=ce_pre_desktop_pub');
	//Hide "PRINT Posts → Tags".
	remove_submenu_page('edit.php?post_type=ce_pre_desktop_pub', 'edit-tags.php?taxonomy=post_tag&post_type=ce_pre_desktop_pub');
	//Hide "PRINT Posts → Periodicals".
	remove_submenu_page('edit.php?post_type=ce_pre_desktop_pub', 'edit-tags.php?taxonomy=chiefed_period&post_type=ce_pre_desktop_pub');

	//Hide "Shots".
	remove_menu_page('edit.php?post_type=ce_periodical_cpt');
	//Hide "Shots → Shots".
	remove_submenu_page('edit.php?post_type=ce_periodical_cpt', 'edit.php?post_type=ce_periodical_cpt');
	//Hide "Shots → Add New".
	remove_submenu_page('edit.php?post_type=ce_periodical_cpt', 'post-new.php?post_type=ce_periodical_cpt');
	//Hide "Shots → Categories".
	remove_submenu_page('edit.php?post_type=ce_periodical_cpt', 'edit-tags.php?taxonomy=category&post_type=ce_periodical_cpt');
	//Hide "Shots → Tags".
	remove_submenu_page('edit.php?post_type=ce_periodical_cpt', 'edit-tags.php?taxonomy=post_tag&post_type=ce_periodical_cpt');
	//Hide "Shots → Periodicals".
	remove_submenu_page('edit.php?post_type=ce_periodical_cpt', 'edit-tags.php?taxonomy=chiefed_period&post_type=ce_periodical_cpt');
}

add_action('admin_menu', 'plt_hide_chief_editor_menus', 11);

Where do I put this code?

How to Hide Chief Editor Meta Boxes

function plt_hide_chief_editor_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Extra PRINT Editorial Informations" meta box.
	remove_meta_box('informations-complmentaires', $screen->id, 'advanced');
	//Hide the "Images source Attachment" meta box.
	remove_meta_box('wp_custom_attachment', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_chief_editor_metaboxes', 20);