By default, in the system, you can only select one of the same type of modifier item. However for certain cases, you may want to select more than one of the same and possible group them or divide them to sections.
In order to archive, you can use the SINGLE / MULTI MODE feature. Once it becomes MULTI MODE, it will allow you to select the same item more than once. Also you can add DIVIDER using ADD GROUP DIVIDER button as well as make an item to be a header of the group.
You can also make the Modifier Group to be MULTI MODE by default with the following setting.
In the same manner, you can make the component item to be GROUP HEADER by default.
