Users can edit text within them using the standard tools of contiguous selection (as discussed in Chapter 19) with either the mouse or the keyboard.

使用鼠标或键盘，用户能够使用标准的连续选择工具编辑其中的文本(正如在第19章中所讨论的)。

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While we discuss the topic in detail in Chapter 21, in our current discussion of direct manipulation it is worth addressing the mouse interactions required by several controls.

我们现在讨论的直接操作中有必要详细讨论控件所必需的鼠标交互。

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