Some time back we discussed about how you can set material master fields visible, hidden or mandatory (Click here to view that). In the same manner you can control fields appear in the customer master as well. This is done at the "Account Group" level of the customer master. Therefore the setting that you do under a specific account group apply to all customers you create with that account group. In addition to that, you can control field settings based on the transaction (Create / Change / Display) as well.
Let's see how you can configure above using standard SAP customizing.
Please feel free to post your suggestions, feedback and comments!