How can I reduce or scroll sidebar brand names?

[Pedz23]

good day everyone! how can i lessen or make scroll for the side bar of brand names.
www.bizsupplystore.com
pw: adm!n321

[Denishamakwana]

Please add below css code in bottom of assets/theme.scss.css file

#Collection .small–hide {
max-height: 400px; ( note: you can set max-height as per your requirement instead of 400px.)
overflow: scroll;

}
Thank you.

[Pedz23]

it worked! thank you