When you key in a supplier in Verify, and master data is being used, the corresponding supplier information can be displayed automatically. This helps you to select the correct supplier, especially if several are very similar. The Supplier info dialog is then shown instead of the field list in the Verifying dialog. As soon as you move the cursor outside of Supplier box, the Supplier info dialog is replaced by the field list and you can proceed to verify the invoice as normal.
A system administrator can specify which fields are displayed in the Supplier info dialog using the SupplierInfoFields setting in Eiglobal.ini.