Which action allows you to view a custom field on the header level of a transaction record?

To display a custom transaction body field in the header section of a transaction record, the Subtab field on the custom field's definition record must be left blank. When this field is not populated, NetSuite defaults the placement of the custom field to the main body of the form, which is the area above the subtabs. The field's exact position within the header can then be further adjusted using the "Customize Form" page for the specific transaction form.

A. Assigning the field to any subtab, including the first one, will place it within that specific tab's content area, not on the main header of the record.
B. Placement is not automatic upon creation; it is explicitly controlled by the configuration on the custom field record, primarily the 'Subtab' setting.
C. There is no standard subtab named "Header" available for selection when creating or editing a custom field in NetSuite.
E. There is no standard subtab named "Main" available for selection. The main area of the form is not considered a subtab.

1. NetSuite Help Center: Creating a Custom Transaction Body Field. In the procedure for creating a custom field, under the "Display" subtab section, the documentation states: "In the Subtab field, select the subtab on which this field should be displayed. If you do not select a subtab, the field is displayed on the main tab of the record." (Accessed via NetSuite application Help Center).

2. SuiteAnswers (Official NetSuite Support Knowledge Base): Answer ID: 9914, Setting Display Options for Custom Fields. This article explains the function of the Display subtab for custom fields. It clarifies that for transaction body fields, "If you leave the Subtab field blank, the custom field appears in the upper portion of the transaction form."