In this configuration activity you are able to define screen layout variants per company code for customer master data.
IMG Path: Financial Accounting (New) -> Accounts Receivable and Accounts Payable -> Customer Accounts -> Master Data -> Preparations for Creating Customer Master Data -> Define Screen Layout per Company Code (Customers)
On the first screen you will get a list of defined variants based on company code. The one with the star(*) will be applicable for all of them.
When you are at detailed section you will see the field groups available for company code editing.