Page scrollbar in editor

I have just started with Bubble and I very excited.

I Have a page with many vertical Groups, stacked each one underneath the parent. And they are all within a Major Group for better Layouting.

Now, there is no Scrollbar on the Page, or the Major Group.

How can I “activate” a scrollbar in the bubble Editor for Page or “main Group” so I can scroll down to the stacked vertical groups?

Currently I hide the Groups I don’t need, but that’s inconvenient.

Thanks for any help