how to

make a container column scrollable

1 make sure your container is in columns type! (container divider into 2 columns)

:nth-child(1) means the first column
:nth-child(2) means the second column

3 add embed element, drag it on the left column, and paste this code for first column scrollable:
<style>
#container01 > .wrapper > .inner > :nth-child(1){
overflow-x: hidden;
overflow-y: scroll;
height:10em;
}
</style>
outcome for first column scrollable

3.1 add an embed element, drag it on the right column, and paste the code if you want the second column scrollable:
<style>
#container01 > .wrapper > .inner > :nth-child(2){
overflow-x: hidden;
overflow-y: scroll;
height:10em;
}
</style>

3.2 you may apply for the both of the columns

outcome for first column scrollable