How to change ListBox height without squashing?

Hello there, I’m trying to resize my listbox but I am using a customised Listbox class that someone else has made. I need to have listboxes of different sizes in my project.

My problem is that when I resize the listbox on the stage this doesnt alter the height (presumably as the height is controlled by code within the class). I have tried going through all of the code and renaming the two customised classes and then altering the size on the stage but this doesn’t work either.

I have tried altering the height of the listbox using ._height but this squashes the box so the text is too small to read. I can’t find any other methods for altering height apart from setSize which I can only get to alter the width.

I’m not sure if I’m missing something obvious or if I’m going to have to delve into the world of customising components.

Any help / advice really appreciated, I’m at a bit of a cul-de-sac with this one at the mo!
Cheers,
Schm