Aurena - Create a Custom field on New manual supplier invoice screen

Hello to all,

I have an environment under IFS APPS10 UPD12 and I have created a custom field in the "Manual supplier invoice" screen: 

I would also like to add it in the "New Manual supplier invoice" screen:

Only, I can't find my custom field in this screen: 

For information, my field is not available in the list of fields available in the "Page Designer". And the logical unit used is: ManSuppInvoiceVirtual.

Is it possible to add a custom field in this type of screen?
Thank you for your help!