一旦您知道 Fn 键的用途，您就不会再忽视它了。它会成为你一天的一部分。Fn 键可访问几个最佳的 Windows 和Mac 快捷方式(Mac shortcuts)。
什么是 Fn 键？(What Is the Fn Key?)
Fn 是函数的缩写。更准确地说，它用于触发函数。Fn 键是我们想要执行键盘顶部 F 键的替代功能时按下的键。
功能键以一种或另一种形式存在至少 50 年。那时编程(Programming)非常困难，所以如果你需要做很多事情，你可以编程一个功能键，只需按一下就可以完成。
今天我们看到的大多只有12 个功能键(12 function keys)，外加 Fn 键。在过去(Back)，这可能从几个到多达 24 个，甚至更多。它们可能位于顶部或有自己的块（如数字键盘），甚至位于 2 个或更多位置。你不高兴你现在只看到你最喜欢的键盘(favorite keyboard)顶部的 12吗？
Fn 键有什么作用？(What Does the Fn Key Do?)
让我们看看 Fn 到底是什么。
Fn + a 功能键的作用因设备类型、设备和键盘制造商(keyboard makers)以及操作系统而异。为简单起见，我们将其保留在Windows和Mac上。
查看键盘上的键，尤其是 F1 到F12键。在其中一些上，有图标以及键的编号。有些文本的颜色可能与键的主要功能不同。
这些图标和文本告诉我们当我们用 F 键按下 Fn 键时会发生什么。例如，Fn + F5。根据设备、键盘和操作系统的不同，Fn 键也可能为其他键释放替代功能。
带有功能键的 Fn 在 Windows 上有何作用？(What Does the Fn with a Function Key Do On Windows?)
对于Windows，使用 Fn + 任何功能键可以控制软件、硬件或Windows功能的组合。带有符号的更常见的特征如下所示。符号(Symbols)会因键盘而异。
- 提高音量
、降低音量
、静音
或
- WiFi 开启
，WiFi 关闭
- 蓝牙开启
或关闭
- 飞行模式开启
，飞行模式关闭
- 睡眠模式
或Zz - 更亮
，更暗
- 播放
, 快进
, 快退
, 停止
, 录音
- 麦克风静音
, 麦克风取消静音
- 共享屏幕
，停止屏幕共享
- 搜索应用
- 打开网络浏览器
- 切换 Fn 锁定
- 锁定屏幕
- 打开和关闭相机
我们还可能会看到带有辅助操作的按键以不同的颜色印在上面。将 Fn 键与这些键一起使用将执行第二个功能。
在 Mac 上使用 Fn 和功能键有什么作用？(What Does Using Fn with a Function Key Do On Macs?)
需要按下Mac 键盘(Mac keyboard)上的 Fn 键才能使用 Windows 用户所说的 F1 到F12键的主要功能。Windows 用户将这些键称为辅助功能的是Mac上的默认操作。您无需使用 Fn 键即可使用这些操作
辅助操作可以特定于Mac上的不同应用程序，例如Safari或Photoshop。此外，您可以自定义或重新映射 Mac 功能键(customize, or remap, the Mac function keys)。MacBook Pro Touch Bar上的功能变得更加有趣。
Apple确实提供了一种更改默认功能键行为的方法，因此我们必须按 Fn 键才能使用媒体控件。
- 选择Apple菜单，然后选择System Preferences。
- 选择键盘(Keyboard)。
- 选择使用 F1、F2 等键作为标准功能键(Use F1, F2, etc. keys as standard function keys)选项。
功能锁键有什么作用？(What Does the Function Lock Key Do?)
在笔记本电脑上，Fn 键可能会激活更多功能。你见过一些字母上也有数字的键盘吗？那是因为它没有独立的数字键盘。
如果您将数据输入到电子表格中，只需使用Fn + Fn Lock键，字母键就会变成数字键盘。完成电子表格后，再次按Fn + Fn Lock以解锁 Fn 键并返回常规输入。
某些键盘可能没有箭头键，因此箭头将是其他键的辅助功能。使用Fn + Fn Lock键，现在这些箭头可以用作鼠标(arrows can be used as a mouse)移动或导航。它们的功能类似于游戏玩家使用的WASD键。
如何在没有 Fn Lock 键的情况下激活 Fn Lock？(How Can I Activate Fn Lock without an Fn Lock Key?)
许多键盘没有Fn Lock键。根据键盘和设备的品牌，Fn Lock可能会以不同的方式激活。或者它可能根本无法激活。尝试以下组合键(key combinations)。如果它们不起作用，请查阅设备制造商的文档。
替代 Fn 锁定键组合(Alternative Fn Lock Key Combos)
Fn + Esc
Fn +大写锁定(Caps Lock)
Fn + Ctrl
Fn +插入(Insert)
为什么我的 Fn 键有两种不同的颜色？(Why Does My Fn Key Have Two Different Colors?)
它很少见，但它仍然存在。某些 Fn 键会在其上印上两次 Fn，每次颜色不同。假设一个是蓝色的，另一个是绿色的。
在这些键盘上，还会有其他带有图标或字母的键与 Fn 颜色中的一种匹配。按下 Fn 加上带有绿色图标的键将触发该功能。用蓝色键按下 Fn 键将触发该功能。这样做是为了按功能将键可视化地组合在一起。
你最喜欢的功能是什么？(What’s Your Favorite Function?)
这就是 Fn 键的详细信息。有些人经常使用 Fn 键，有些人会在阅读本文后第一次使用 Fn 键。你用Fn键吗？你用它来做什么？您知道 Fn 键的不同用途与我们在这里提到的用途不同吗？我们很想听听。
What Is the Fn Key on Your Keyboard and What Does it Do?
Once you know what the Fn key іs for, yoυ won’t neglect it anymore. It’ll become part of your day. The Fn key accesses several of the best Windowѕ and Mac shortcuts.
What Is the Fn Key?
Fn is an abbreviation for function. More accurately, it’s used to trigger functions. The Fn key is the one we press when we want to do things that are the alternate functions of the F keys at the top of the keyboard.
The function keys have been around in one form or another for at least 50 years. Programming was extremely difficult back then so if there was something you needed to do a lot, you could program a function key to do it with just one press.
Today we see mostly just 12 function keys, plus the Fn key. Back in the day, that could have ranged from just a few to as many as 24, maybe more. They could be across the top or have their own block like the number pad, or even be in 2 or more places. Aren’t you glad you only see the 12 at the top of your favorite keyboard now?
What Does the Fn Key Do?
Let’s see what Fn is really all about.
What the Fn + a function key does differs among device types, device and keyboard makers, and operating systems. For simplicity’s sake, we’ll keep it to Windows and Mac.
Look at the keys on your keyboard, especially the F1 to F12 keys. On some of them, there are icons as well as the number of the key. Some may have text in a different color from the main function of the key.
Those icons and texts tell us what will happen when we press the Fn key with an F key. For example, Fn + F5. Depending on the device, keyboard, and operating system, the Fn key may unleash alternate functions for other keys too.
What Does the Fn with a Function Key Do On Windows?
For Windows, using Fn + any function key can control a combination of software, hardware, or Windows features. The more common features with symbols are shown below. Symbols will vary between keyboards.
- Volume up
, Volume down
, Mute
or
- WiFi on
, WiFi off
- Bluetooth on
, or off
- Airplane mode on
, Airplane mode off
- Sleep mode
or Zz - Brighter
, Dimmer
- Play
, Skip forward
, Skip backward
, Stop
, Record
- Mic mute
, Mic unmute
- Share screen
, Stop screen share
- Search apps
- Open a web browser
- Toggle Fn lock
- Lock the screen
- Toggle camera on and off
We may also see keys with secondary actions printed on them in a different color. Using the Fn key with those keys will perform the second function.
What Does Using Fn with a Function Key Do On Macs?
The Fn key on a Mac keyboard needs to be pressed to use what Windows users would call the primary functions of the F1 through F12 keys. What Windows users would call secondary functions for those keys are default actions on a Mac. You don’t need to use the Fn key to use those actions
The secondary actions can be specific to different apps on a Mac, like Safari or Photoshop. Plus, you can customize, or remap, the Mac function keys. Functions on a MacBook Pro Touch Bar get even more interesting.
Apple does provide a way to change the default function key behavior so that we have to press the Fn key to use the media controls.
- Select the Apple menu then System Preferences.
- Select Keyboard.
- Select the option Use F1, F2, etc. keys as standard function keys.
What Does the Function Lock Key Do?
On laptops, the Fn key may activate even more things. Have you seen a keyboard where some of the letters have numbers on them too? That’s because it doesn’t have a stand-alone number pad.
If you are entering data into a spreadsheet, just use the Fn + Fn Lock keys and the letter keys become a number pad. When you’re done with the spreadsheet, press Fn + Fn Lock again to unlock the Fn key and go back to regular typing.
Some keyboards may not have arrow keys so the arrows will be secondary functions on other keys. Use the Fn + Fn Lock keys and now those arrows can be used as a mouse to move things or navigate. They function like the WASD keys a gamer would use.
How Can I Activate Fn Lock without an Fn Lock Key?
Many keyboards don’t have the Fn Lock key. Depending on the make of the keyboard and device, the Fn Lock might be activated in different ways. Or it might not be able to be activated at all. Try the following key combinations. If they don’t work, consult the device manufacturer’s documentation.
Alternative Fn Lock Key Combos
Fn + Esc
Fn + Caps Lock
Fn + Ctrl
Fn + Insert
Why Does My Fn Key Have Two Different Colors?
It’s rare yet it’s still out there. Some Fn keys will have the Fn printed on them twice, each in a different color. Let’s say one is blue and the other is green.
On these keyboards, there will be other keys with icons or letters on them that match one of the Fn colors. Pressing the Fn plus a key with a green icon will trigger that function. Pressing the Fn key with a blue key will trigger that function. This is done to visually group keys together by function.
What’s Your Favorite Function?
That’s the details on the Fn key. Some people use the Fn key constantly, some people will be using the Fn key for the first time after reading this. Do you use the Fn key? What do you use it for? Do you know of different uses for the Fn key than the ones we’ve mentioned here? We’d love to hear about it.
