The cart drawer is enabled by default in Next theme you can access cart drawer settings from theme settings > cart drawer.
Enable cart drawer
With this setting you can choose whether or not you want to enable the cart drawer. This is enabled by default, but when you want to make sure your customers are always being redirected to the cart page when adding a product, you can disable this feature.
Empty cart text
Replace Your cart is empty.. with your desired text.
Enable undo deleted products:
Enable this if you want to give a visitor the option if a product is removed, it can be undone.
Enable timer for undo deleted products:
This will show the undo feature for a certain amount of seconds.