# Drop-down Menu

###### [ File Path: super/select_menu.html ]

- Press Ctrl key to select multiple cities
- city: select

- ## Explanation of implementation method

  - Achieve this drop-down menu, it is relatively easy, you only need to control zTree Hide / Show, and location.
  - Use zTree v3.x, you can select multiple nodes, so the multi-selection is also easy.
  - Use the configuration parameters setting, fully meet the needs of most of the functionality.