How to change the type of additional checkout fields?

How to change the type of additional checkout fields?

The One Step Checkout for Magento 2 extension allows adding up to 3 custom checkout fields (System → Manage Checkout Fields → Add Custom Fields). By default, they are set as text field attributes, and it is impossible to change their type with the out-of-box functionality. 



If you need to use attributes of other types (dropdown, radio button, multi-select, etc.), you may consider purchasing our Order Attributes for Magento 2 extension which includes an extended list of attribute types.