您可以使用set内置控件的noclobber选项对此进行控制。
You can control this with the noclobber option of the set builtin.
这可以是屏幕左边显示为列的内置复合应用程序导航器，也可以是呈现按钮列表及其下拉选项的定制控件。
This could be the built-in composite application navigator that appears as a column to the left of the screen, or it could be a custom control that presents a list of buttons with drop-down options.
作为UI布局和控件模型体验的一部分，WPF也提供了对Flow Document的内置支持。
WPF also provides built-in Flow Document support as part of the UI layout and control model experience.
应用推荐