The menu item named as ’Collections’ in the left bar enables you to list multiple collections under. Once you add it to your menu, click on the 'Customize Sub-Collections' button that will appear on your right.
After you click on it, you will be directed to a pop-up page in which you can select the sub-collections. The selected sub-collections will appear on your right. By dragging the sub-collections, you can change their order. Also, you can create sub-collections in sub-collections as shown below.
You can also change the display type of the sub-collections from the right menu.
Below you can see how each type will display your sub-collections.
Type 1 Type 2 Type 3 Type 4
If type 3 is chosen and the collections don't have images, your sub-collections will be displayed only with the title in the middle.
*Sub-Collection feature is can only be used with Gold Plan and above.
Please feel free to reach out if you have further questions.
Thanks for reading!