Controlling the Visibility of Fields
Do one of the following.
Select the Hide item in the field header context menu.
Drag a field away from the header panel, until the cursor changes its image to the big 'X'. Then drop the header.
Drag and drop a field onto the Field List form.
Open the Customization Form, and drag the field header from the Customization Form to the required area within the PivotGridControl.
Select a field in the Customization Form and a Pivot Table area in the drop-down combo box and click the form's Add To button.
If a field's PivotGridFieldOptions.ShowInCustomizationForm option is disabled, the field is not displayed within the Customization Form.