I have a Select Field with Select multiple Values and Stylished UI enable.
Is it possible add a Select All option to select all options?
Thank you
From what I can find, select2 does not have a select all option https://github.com/select2/select2/issues/195. If it did you could use the select2_init filter https://www.advancedcustomfields.com/resources/adding-custom-javascript-fields/.
But since select2 does not appear to have this option then it’s not something that I think can be added.