Apple Pencil无疑是您今天可以买到的最好的平板电脑手写笔。这是对文档进行标记工作的绝佳工具，尤其是PDF(PDFs)。不幸的是，并不总是很清楚如何使用Apple Pencil来注释 PDF。
在本文中，我们将向您展示如何将您的Apple Pencil变成PDF标记工具，让您的同事和朋友惊叹于您高质量的笔记制作能力。
关于Apple Pencil的重要事项(Apple Pencil)
如果您仍在购买Apple Pencil，请记住 Pencil 有两个版本(Pencil)。此外，它们与相同的 iPad 型号不兼容。第一代 Apple Pencil(first generation Apple Pencil)可与当前仍使用Lightning接口的 iPad 机型以及所有使用 Lightning 接口的 iPad Pro机型配合使用。
第二代 Apple Pencil(second generation Apple Pencil)适用于具有USB-C端口的iPad Pro设备。(Pro)这些新型号通过磁力吸附在平板电脑的侧面后可以无线充电。
您需要Apple Pencil来注释PDF吗？
不！您不需要Apple Pencil来注释PDF。根据应用的不同，任何手写笔都应该可以工作，例如这种廉价的“哑”手写笔(inexpensive “dumb” stylus)。
还有其他压敏产品适用于某些应用程序和简单的触控笔，它们不是压敏的，但与使用手指相比，可提供更好的手写或绘图体验。
Apple Pencil无疑会在每种情况下提供更准确、更舒适的体验，但通常一个简单的“笨”手写笔就足以完成工作。
如果Apple Pencil不太适合您，请查看我们关于Apple Pencil 替代品(Apple Pencil Alternatives)的文章。有四个很好的选择可能更适合您的需求和预算，这表明 Apple 自己的内部产品远非城里唯一的游戏。
Apple Pencil 批注(Apple Pencil Annotation)的优点
对于原生支持Apple Pencil的应用程序，您可以利用它的压力感应、倾斜功能以及Apple内置的所有其他技术，以获得逼真和细致入微的书写体验。
这对你有多重要会因人而异。此外，个别应用程序开发人员可以选择 Pencil 的哪些功能对他们来说很重要。
利用Apple Pencil的应用程序(Apple Pencil)
虽然许多应用程序都有一种模式，您可以使用任何手写笔在PDF上简单地书写，但一些应用程序对使Apple Pencil出色的独特功能具有特定支持。以下三个应用程序不仅仅是与Apple Pencil配合得很好的应用程序，它们也是我们认为独立于注释PDF文档的优秀工具的应用程序。
Adobe Acrobat当然是(Adobe Acrobat)处理 PDF(working with PDFs)最明显的选择。毕竟，Adobe是最早发明PDF的公司！
该应用程序是免费的，包括许多不同的注释PDF的方法。例如，您可以添加便签或突出显示文本。虽然Adob(Adobe) e 没有确切说明他们依赖Apple Pencil的哪些功能，但他们确实表示手绘注释具有“出色的注释精度”。我们认为它是在此应用程序中制作PDF注释的最佳且最类似于纸的选项。
PDF Expert是 iOS 上另一个非常流行的PDF阅读器和注释工具。这(Which)是完全有道理的，因为它出色地完成了这两项工作。PDF Expert支持Apple Pencil的压力感应，具体取决于您选择使用的注释笔。这意味着您可以进行看起来像自然笔触的高度详细和准确的注释。
知名度(Notability)
与我们在这里强调的其他两个选项不同，Notability主要不是PDF阅读器。相反，这是一个专门的笔记应用程序，也可以用作PDF注释工具。因此，实际注释和注释的深度和质量比竞争对手高出一步。
它支持并充分利用Apple Pencil。它的墨水引擎不仅经过调整以提供逼真的Apple Pencil使用体验，您还可以使用它来执行诸如擦除或仅使用Pencil本身切换工具等功能。
如何使用Apple Pencil和Adobe Acrobat注释(Adobe Acrobat)PDF(PDF Using)
在任何平台上，最受欢迎的PDF阅读器无疑是Adobe Acrobat。它是免费的，除非您想要实际编辑PDF文档的能力。批注(Annotation)不是一项付费功能，所以让我们看看如何使用Apple Pencil批注(Apple Pencil)PDF。
打开PDF文档并连接铅笔(Pencil)后，点击屏幕右下方的蓝色铅笔图标。从弹出的菜单中，选择Comment。
您会注意到此工具栏出现在页面顶部。
选择最左侧的工具以激活荧光笔。现在使用铅笔突出显示您选择的任何文本。
如果要停用注释工具，只需再次点击它即可。Pencil 用户(users)的另一个重要工具是铅笔。点击它，然后做任何你想要的书面笔记或绘图。
您可以用手指翻页或滚动文档。用铅笔做完笔记后，只需点击完成(Done)，Acrobat将返回正常阅读模式。
钢笔更强大
史蒂夫乔布斯(Steve Jobs)有句名言，需要手写笔的平板电脑是失败的。好吧(Well)，你的 iPad 根本不需要(need )手写笔。没有它，它是一台非常好的平板电脑。相反，Apple Pencil增强了已经很棒的触控体验。
对于学生、作家、编辑和其他必须广泛处理PDF文档编辑的任何人，铅笔(Pencil)在舒适性、速度和准确性方面改变了游戏规则。因此，请在您遇到的每个PDF文档上留下您的红色标记。您现在可以对PDF(PDF)进行注释！
How To Annotate a PDF File Using Apple Pencil
The Apple Pencil іs undоubtedly the best tablet stylus you can buy today. It’s an аmazing tool for doing markup work on documents, especially РDFs. Unfortunately, it’s not always clear how to use yоur Apple Pencil to annotate a PDF.
In this article, we’re going to show you how to turn your Apple Pencil into a PDF markup powerhouse, leaving your coworkers and friends in awe of your quality note-making ability.
Important Things To Know About The Apple Pencil
If you’re still in the market for an Apple Pencil, keep in mind that there are two versions of the Pencil. Also, they aren’t compatible with the same iPad models. The first generation Apple Pencil works with current iPad models that still use the Lightning connector as well as all iPad Pro models that use the lightning connector.
The second generation Apple Pencil works with iPad Pro devices that have a USB-C port. These new models recharge wirelessly after being magnetically attached to the side of the tablet.
Do You Need An Apple Pencil To Annotate a PDF?
No! You don’t need an Apple Pencil to annotate a PDF. Depending on the application, any stylus should work, such as this inexpensive “dumb” stylus.
There are other pressure-sensitive products that work in some applications and simple styluses that are not pressure sensitive, but which offer a better handwriting or drawing experience compared to using your fingers.
The Apple Pencil will undoubtedly provide a more accurate and comfortable experience in every case, but often a simple “dumb” stylus will be good enough to get the job done.
If the Apple Pencil isn’t quite your jam, have a look at our article on Apple Pencil Alternatives. There are four great choices which might better suit your needs and budget, showing that Apple’s own in-house product is far from the only game in town.
Advantages Of Apple Pencil Annotation
For applications that natively support the Apple Pencil, you get to take advantage of its pressure sensitivity, tilt function and all the other technologies Apple has packed into it for a realistic and nuanced writing experience.
How much this matters to you will differ from one person to the next. Also, individual app developers can choose which of the Pencil’s features are important to them.
Apps That Take Advantage Of Apple Pencil
While many apps will have a mode where you can simply write on a PDF using any stylus, a few apps have specific support for the unique features that make the Apple Pencil great. The following three applications aren’t just apps that work well with the Apple Pencil, they are also apps we think stand on their own as excellent tools to annotate a PDF document.
Adobe Acrobat is of course the most obvious choice for working with PDFs. After all, Adobe is the company that invented PDF in the first place!
The app is free and includes many different ways to annotate a PDF. For example, you can add sticky notes or highlight text. While Adobe doesn’t say exactly which Apple Pencil features they rely on, they do say that freehand annotations have “exceptional commenting precision”. Which we take to mean that it’s the superior and most paper-like option for making PDF annotations in this application.
PDF Expert is another very popular PDF reader and annotation tool on iOS. Which makes perfect sense, since it does both jobs excellently. PDF Expert supports pressure sensitivity with the Apple Pencil, depending on which annotation pen you choose to use. This means you can do highly-detailed and accurate annotations that look like natural pen strokes.
Unlike the other two options we’ve highlighted here, Notability isn’t primarily a PDF reader. Instead, this is a specialized note-taking app that can also work as a PDF annotation tool. As such, the depth and quality of actual notes and annotations is a step above the competition.
It supports and makes the most of the Apple Pencil. Not only is its ink engine tuned to provide a lifelike experience using the Apple Pencil, you can also use it to do functions such as erasing or to switch tools by just using the Pencil itself.
How To Annotate a PDF Using An Apple Pencil And Adobe Acrobat
The most popular PDF reader, on any platform, is undoubtedly Adobe Acrobat. It’s free, unless you want the power to actually edit your PDF documents. Annotation is not a paid feature, so let’s look at how you can annotate your PDF using the Apple Pencil.
After opening your PDF document and with the Pencil connected, tap on the blue pencil icon on the bottom right of the screen. From the menu that pops up, choose Comment.
You’ll notice that this toolbar appears at the top of the page.
Choose the tool on the far left to activate the highlighter. Now use your pencil to highlight any text you choose.
If you want to deactivate an annotation tool, just tap it again. The other important tool for Pencil users is, well, the pencil. Tap on it, and then make any written note or drawing you wish.
You can use your finger to turn pages or scroll through the document. When you are done making notes with your pencil, just tap Done and Acrobat will return to the normal reading mode.
The Pen is Mightier
Steve Jobs famously said that a tablet that needs a stylus is a failure. Well, your iPad doesn’t need a stylus at all. It’s a perfectly good tablet computer without it. Instead, the Apple Pencil offers an enhancement to an already great touch experience.
For students, writers, editors and anyone else who has to deal extensively with PDF document editing, a Pencil changes the game when it comes to comfort, speed, and accuracy. So go forth and lay down your red marks on every PDF document that comes your way. You have the power to annotate a PDF now!
