At this precise moment, if you want to try out the stacked windows features, you have to add the stacking branch to the system with sudo apt-manage add popdev:stacking. When the branch is merged you'll have to remove it with sudo apt-manage remove popdev-stacking.
I am so excited for the future release of COSMIC. You all are doing incredible work.
There's an installation and setup guide here.
At this precise moment, if you want to try out the stacked windows features, you have to add the stacking branch to the system with
sudo apt-manage add popdev:stacking. When the branch is merged you'll have to remove it withsudo apt-manage remove popdev-stacking.