toggle
noun [ C ] uk/ˈtɒɡ.əl/ us/ˈtɑː.ɡəl/
(FASTENER)
套索扣，栓扣钉
a small bar of wood or plastic that is used to fasten something by being put through a hole or loop
(COMPUTER SWITCH)
切换键
a key or button on a computer that is pressed to turn a feature on and then off
Select the function you require by pointing to the toggle (= image of a button on the screen) with the mouse and then clicking. 将鼠标移向切换图标并点击，选择你所需要的功能。
toggle
verb [ I or T ] uk/ˈtɒɡ.əl/ us/ˈtɑː.ɡəl/
（点击同一按键来）切换
to switch a feature on a computer on and off by pressing the same button or key
Use this key to toggle between the two typefaces. 用这个键在这两种字体间切换。
By toggling this key, you can switch the italics on and off. 用这个键来切换，你能够打开和关闭斜体字。