menu.settings.yml

MenuSettingsForm::buildForm in drupal/core/modules/menu/lib/Drupal/menu/MenuSettingsForm.php

Implements \Drupal\Core\Form\FormInterface::buildForm().

menu_main_menu in drupal/core/includes/menu.inc

Returns an array of links to be rendered as the Main menu.

menu_secondary_menu in drupal/core/includes/menu.inc

Returns an array of links to be rendered as the Secondary links.

menu_update_8000 in drupal/core/modules/menu/menu.install

Moves menu settings from variables to config.

menu_update_8003 in drupal/core/modules/menu/menu.install

Moves menu_override_parent_selector from variables to config.

main_links: main
secondary_links: account
override_parent_selector: '0'