Then in a later section, see how the user interface can be improved for document search by using a tree control for displaying and selecting the metadata conditions.
然后，在后面的小节中，将了解如何使用树控件显示和选择元数据条件，从而改进文档搜索的用户界面。
2
The software design and development of this IP telephone is well introduced in this document including its network module, voice processing module, main control module and user interface module etc.