How do i make the text autowrap in the vn choice button? using alpha 18

[nzaaia]

in my game, the choices will be dialogue options so i want them to fit a big text which autowraps. The choice box will have a maximum width. How do i make that change?
the problem is, i cant find the label or a choice button in the dialogic 18. I found it in dialogic 16 tho but after updating im very confused. What do i do? please help :(