That post was addressed toward a user that has Zorin OS Lite.
On Core, you would run
nautilus
instead of thunar.
Once Nautilus is opened, in the left pane, click Other Locations, then in the right pane, double click computer
That will get you to the Root Directory Tree.
From there, can pick up with that other post:
Gnomes Nautilus foolishly ties in that functionality to the default Templates folder in the Home Directory. This also is the reason that I cannot keep any of my actual templatesin the Templates Folder and have to make separate ones.
Ensure that you have a ~/Templates directory. If you do not, then make one:
mkdir ~/Templates
Then,
touch ~/Templates/Text\ File.txt
That references this post:
Upon opening the Guide in the link, you would continue from this line:
Then go to “/usr/share/X11/xorg.conf.d” and add one of the files below for your graphics card.
After further testing I dont have a screen tearing issue unless I change my display scale to fractional scaling. At 100% it's all pretty small and I like it just a big bigger like 125% but as soon as I do that I get screen tearing again.
Fractional Scaling is a work in progress.
It's one of the reasons I also prefer Zorin OS Lite so I can use DPI instead.
I would recommend that if Fractional Scaling gives issues - to keep it at 100%; because the issues you notice may be only some of the issues it is causing.