To set up parent-child menu categories, please follow these steps:
1. On the management page
Go to Menu/Menu offline. On Categories tab, click Add. If it is a parent category, check Parent category. Then, click Save.

If the old category is a child one and you want to change it to a parent category, check Parent category. Click Save.

This message will appear. If you want to proceed, click Yes.

If it is a child category, select a parent category in Under category.

This is how categories look.

2. On PC/POS
Go to Menu.

On Menu category tab, click Add category. If it is a parent category, check Parent category. Then, click Save.

If the old category is a child one and you want to change it to a parent category, check Parent category. Click Save.

This message will appear. If you want to proceed, click OK.

If it is a child category, select a parent category in Under category.

This is how categories look.

Have a nice day!