If you do not already have a compatible field for your automation's output (e.g. for a resized image), leave the output field empty and choose Generate. miniExtensions will create a compatible field in Airtable and select it automatically. Generate is shown only for supported output fields; it is not available for source or input fields.
How to have output fields for automations generated
I don't have a field for the automation output yet. Do I have to manually create one first?