Hi Shane Perry,

you can do it in two ways, option 1. As the choices are only over 20 if your form space permits you can make it multi column control like below.

All you have to do for that is expand appearance section in the control settings and mention how many columns you want the choices to be arranged.

that should give your form good look without adding scroll in the middle of page. 

but if your choices are lot more and you need scroll place control in a panel with fixed height by choosing auto resize at run time option to no. it should give you the scroll bar and keep contents at fixed height.

I hope this helps.

Thanks. That does help. I used the panel trick and it works now.