Choose the fields for the Main author and Co author

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

Select the fields that the Contact person/Main author and Co author need to fill out.

Below you see the fields that the Contact person/Main author needs to fill out.

In the following image the fields are shown that the Co author needs to fill out.

When working with affiliations, the 'Link fields to roles' can be found in the blue menu.

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