I have several modifiers that are optional. For example, a Latte has an optional milk alternative. By default we will use whole milk, but offer other options. That milk alternative modifier has NONE as the required, and 1 as MAX selections. When looking at the app it pre-selects the first entry and doesn't allow deselecting it. I think it would be ideal if the selections change to a "radio" button or dropdown when this configuration is in place as it does on Square Online. I know I can add "Whole Milk" as another option, but I shouldn't have to as it works everywhere else.