Choose the fields for the Main author and Co author

Go to the Abstract Module -> Page Editor -> (Co-)Author Data Page -> Link Fields To Roles (in the blue menu). Select the field you want to see per role.

Select the fields that the Contact person/Main author and Co author must complete.

Below you see the fields that the Contact person/Main author must complete.

Use the sliders to switch between contact person/main author/co author.

In the following image the fields are shown that the Co author must complete.

Please select a field and right-click to edit the field (change the field name and make it required or not).