Click on Icon and Change size of window and you will see effect
Anchor solution allows to set fallback value. So, if the dropdown doesn’t have enough space to show it, fallback value will be used.
If you want to hide dropdown in editor, disable it from editor in Responsive option
You can find Anchor options in Position Panel. Polyfill will be added automatically to all browsers that do not have Anchor API support.
You can read more about anchor API in tutorials