Linktree preview style - right side always centered

How can I copy this experience?

on the right side of the linktree “edit profile” page.

while I can scroll the whole page on the left side,
the right side preview always stays centered.

I’m not sure how to keep the right group to stay centered top to bottom as I scroll.

ah found the solution 15 minutes later through tinkering, but thought I’dshare it here.

create a Floating Group

first field “vertically float relative to” set it to “Nothing”