Lists the available fields for the field type selected in the Type list. To insert a field, click the field, and then click Insert.
格式
If a field is displaying a date, time or number, then Format is used to customize the appearance of the date, time, or number. Common formats are shown in the Format window, or click "Additional formats" to define a custom format.
不可见
Hides the field contents in the document. The field is inserted as a thin gray mark in the document. This option is only available for the "Set Variable" and "User Field" field types.
Value
Enter the contents that you want to add to a user-defined field.
