通过鼠标的滑动可以进行数码变焦，也可以拖拉滚动条来控制录制的窗口。
Digital zoom with the mouse scroll wheel, and drag to scroll the recording window.
交通密度能通过菜单中旳滑动条来控制。
Traffic density can be controlled via the menu by way of a slider.
其进一步的优点在于：滚动条滑动块不随时间改变尺寸，在无用户输入的情况下也不移动，使得用户与滚动条控制部件交互作用更容易。
This has the further advantage that the scrollbar thumb does not change size over time nor move without user input, making it easier for a user to interact with the scroll bar control.
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