Add a Field
In order to add or delete a field in Screen in Customers/Suppliers module, you need to do below steps:
Go to Setup, Customers, Screen Designer. (same step for Suppliers, just change the module)
Choose the document that you want to edit.
Press Section F4 to choose the section you want to edit.
Press Accept F9.
Press Zoom In F3 to view the details in the section. The field that you want to add must be in the Zoom In screen, only then you will be able to edit the screen.
Press anywhere on the screen at the area of the section you choose to edit.
Press Data F9. Press Page Down if you don't see the field that you want to add.
Choose the field and drag to the area that you want it to be.
Press Text F8 to add the text in the Screen. Press Page Down if you don't see the field that you want to add.
Press Save F7.
Press Accept F9 and Esc.
Delete a field
Follow steps 1 to 4 for adding a field.
Select the field that you want to delete.
Press Delete F2.
Press Yes to delete.
Press Save F7.
Press Accept F9 and Esc.