Hey 
,
That has to do with collapsing groups.
Check out a bunch of videos here: https://www.nocodeminute.com/1-minute
Build like blocks on top of each other. Don’t overlap things.
Check this video out for collapsing all groups: https://www.nocodeminute.com//1-minute?video=1585757480992x297732410421604600
I hope that helps a bit, I will be doing more in-depth videos on my eLearning Hub about that too.