The collection list page will display all or some set of your collections which has same header settings with other page templates.
Select collections to show: You can choose to display All of your collection or selective collections
Sort collections by: Collection sorting
Collections per row: Number of collection will displayed per row
If you choose to select some specific collections, you will need to add more collection in block content. simply click on [+] Add collection on the bottom of your left sidebar then choose your desired collection.