How to customize folder_contents on Plone 5?

问题:

I'm on Plone 5 and I want to modify the number of columns that are shown by default on /folder_contents.

If I recall correctly, the whole table is a pattern that gets initialized with quite a huge JSON data-xxx parameter on the corresponding tag.

So, should I dig into the JSON or rather put my attention on the JS pattern?

Is there any documentation on how to customize it anywhere? A quick google search didn't show up anything relevant to me :-/