Collection templates in Paper are compatible with Shopify's official app. This app can be used to customize and extend the available filters for your store.
1
Enable collection filters
Go to Online Store > Themes > Customize
From the dropdown in the center of the top bar select Collections > Defaultcollection
On the left hand side, select Collection grid in the theme sections
Scroll down under Display and check Enable filter
2
Enable collection sorting
Go to Online Store > Themes > Customize
From the dropdown in the center of the top bar select Collections > Defaultcollection
On the left hand side, select Collection grid in the theme sections