The Plain Classes feature is not only about managing your global class list, but it makes adding your classes easier and faster.
Once the builder tweak is activated, you’ll see a “P” icon inside the class field. The icon will only be visible when you’re inside the element vue – it will not appear if a class is active.

Clicking on the Plain classes icon will open a new modal where you can manage your global classes through a text area field.

let’s now add a couple of new classes using the autocomplete feature. Just digit the first letters of your class:

A suggestion dropdown is showing all the global classes that match the initial letters. Use the UP/DOWN key arrows to select the one you are after and hit “Enter” to autocomplete the class.
Let’s do the same for our third class:

Once you’re happy with the global class selection, click on the “Update Classes” button and you’re done!