Click the 'Organise' button below your collection’s name.

1. You will now see a button that says '+ Section'. Press this and name your first section. You can add up to 10 sections to a collection.

2. Under each product you will see a + button, use this to add the products to a section.

3. Once you have finished, click the black 'Save changes' button.

The video below explains more about how to use this feature: