To add the field in the Incident Console you have to add the field in the Incident "Fields Sets" in the Incident custom object.
The Incident object have Field Sets like:
Console - Client Details, Console - Date and Time, Console - Incident Details, Console - Service and CI, Console - Status and Priority Etc.
To access the Incident field sets:
>Go to Setup | Create | Objects | Incident Object
>Scroll down to the fields sets select 'edit' for the field set in which you want to add the field.
>To add new fields to the list of incidents in the Incident Console Tab, Drag and Drop the fields to the Column Headers field
>Verify the desired field appear in the Incident Console.
My question is not how to update field sets, my question is how to make Fields available to Field Sets
You are correct. Thank you.