Where (and how) to customize the 'browse display' into columns

Is there a way to customize the layout in the default theme? When i see this site (made with Omeka-S) it looks very possible: https://archivografico.ulpgc.es/item?fulltext_search=&sort_by=dcterms%3Atitle&sort_order=asc

But i can’t find it yet. I see only two fields now: title, and date. But not in columns yet. So i’d like to customize: more fields (title, date, type, description)… how to do that? Where? :blush: sorry if i missed this in the user manual