The value of a variable in an Input field is only valid from where the field is inserted and onwards. To change the value of the variable later in the document, insert another Input field of the same name, but with a different value. However, the value of a User Field is changed globally. Selection
输入字段中变量的值仅在自该字段插入位置起向前的范围有效。要在文档中稍后的位置修改变量值，需要插入另一个名称相同但值不同的输入字段。但用户字段的值会发生全局性修改。