Combos can be considered by you as smart addons. This feature will allow you to group your addons by different categories. For example, if you offer different sauces as addons, you can create a Combo called sauces and put everything there.
Firstly, you need to specify the name for your Combo. Then you can limit the number of options which can be chosen by your client. For example, only 5 addons can be chosen.
Force to select option switched to limited will force a client to choose a specific number of addons before proceeding to checkout.
Then, you need to specify options inside your Combo. Please be aware that if you leave the price field empty, your clients will be able to choose this addon for free.
At the end, you can receive something like this. Here, we are using two Combos simultaneously