When creating a field, what does the option Stylised UI do?
I would also like to know this.
I’m guessing you guys already figured it out, but in case anyone else arrives at this page looking for clarity you can get more information on this page: https://www.advancedcustomfields.com/resources/select/
The description says:
This setting will use the Select2 JS library to enhance your select field with more functionality (search, ajax, reorder). Added in version 5.0.0