You can use function with the arrow keys to raise or lower volume, increase or decrease brightness, etc.

您可以使用带有箭头键的功能来提高或音量、增加或度等。

One asked them to press an arrow key that matched the right or left arrow on a computer screen.

其中一要求他们按算机屏幕上的向右或向左箭头相匹配的箭头键。

Though they do work by default, try to avoid them, because you don't want to have to move your hand all the way over to the arrow keys.

尽管它们默认有效，但请尽量避免使用它们，因为您不想将手一直移到箭头键上。