I would like try out something new in CMS and don't know yet how this will work? How can I test it?
It has turned out to be good practice to create a subfolder called playground for testing.
This folder must not (!) be released and can be viewed in the separate preview window .
Later on you can take over the functioning results by copy and paste into the productive CMS folder(s).
Please note that you need to check if internal links have been adjusted corrected. You may need to do some manual corrections.