To attach a worksheet to the active field, use either of these two methods.
1) Select the field worksheet in the Attachments list part of the Table of Contents pane, and then press the Add Selected button. First you may have to press the Fields button to show the available fields worksheets.
2) Press the Add Field Worksheet button on the Field Actions toolbar. The Add Worksheet to Field dialog will be opened. Select the field worksheet from the list of available worksheets and press the OK button.
Either of these methods will add the selected worksheet to the case as being attached to the active field.
Note: If the Add Field Worksheet button is disabled then there are no field worksheets available for the active field.