For example , you can set a visual indicator to alert you when a custom field ' s data exceeds the expected range you ' ve specified , or another one to indicate resources who are overallocated 譬如,您可以设置一个可见的标记用于警告某个域的数据超出了事先指定的预期范围,或者再设置一个标记用于指示过度分配的资源。