Inserts a custom global variable. You can use the User Field to define a variable for a condition statement. When you change a User Field, all instances of the variable in the document are updated.
插入自定义的全局变量。您可以使用“用户字段”定义条件语句的变量。修改“用户字段”时，文档中此变量的所有实例都会更新。