快速入门
本指南涵盖了PDF Expert的所有功能：
- 入门 — Create your account and set up the app
- 如何使用编辑PDF — Modify text, images, and links in any PDF file
- 如何使用 PDF 注释功能 — 高亮显示文本并标记文档
- 如何使用标记和注释 — Add notes, stamps, and comments to pages
- 如何使用转换 PDF 功能 — 将 PDF 文件转换为 Word、Excel 或图像文件
- 如何使用签名 PDF — Sign documents in seconds on any device
- 如何使用注释 PDF — Insert comments and feedback into documents
- 如何使用“添加图片”功能 — Drop images into your PDF pages
- 如何使用管理页面 — 重新排列、旋转和删除页面
- 如何使用合并PDF功能 — Combine multiple PDF documents into one
所需时间： 每部影片 5 分钟
本指南还包含以下内容： 专业提示 | 常见错误 | 故障排除 | 定价 | 替代方案
为什么信任本指南
I’ve used PDF Expert for over two years and tested every feature covered here. This how to use PDF Expert tutorial comes from real hands-on experience — not marketing fluff or vendor screenshots.
PDF Expert is one of the most powerful PDF editor and reader apps for Mac, iPad, and iPhone.
但大多数用户仅仅触及了它功能的冰山一角。
本指南将向您展示如何使用所有主要功能。
一步一步教你，附带截图和专业技巧。
PDF专家教程
本 PDF Expert 完整教程将一步一步地引导您了解每个功能，从初始设置到高级技巧，让您成为高级用户。
PDF专家
Edit, annotate, sign, and manage PDF documents on Mac, iPad, and iPhone. PDF Expert gives you all the tools to handle any PDF task with speed and accuracy. Try it free with a 7-day trial.
PDF Expert入门指南
使用任何功能之前，请先完成此一次性设置。
大约需要3分钟。
请先观看这段简短的概述：
现在让我们一步一步来。
第一步：创建您的帐户
Go to the PDF Expert website or open the App Store on your Mac.
Click “Download Free” or “Get” to start the install.
Create a Readdle account with your email and a password.
✓ 检查点： 检查你的 收件箱 请发送确认邮件。
步骤二：下载或访问应用程序
On Mac, download PDF Expert from the App Store or pdfexpert.com.
On iPad or iPhone, download the iOS version from the App Store.
Log in with your new account on each device.
这就是仪表盘的样子：
✓ 检查点： You should see the main screen with your file collection.
步骤 3：完成初始设置
Connect your cloud storage services like iCloud, Dropbox, or Google Drive.
The iOS version lets you store files locally in PDF Expert too.
Explore the toolbar at the top to see where all the tools are grouped.
✅ 完成： 您已准备好使用以下任何功能。
如何使用 PDF Expert 编辑 PDF
编辑PDF文件 lets you modify 文本, images, and links in any PDF document.
PDFs aren’t editable by design, but PDF Expert makes them fully editable.
以下是使用步骤。
观看编辑 PDF 的实际操作演示：
现在让我们逐一分析每个步骤。
步骤 1：打开您的 PDF 文件
Open any PDF file by dragging it into the app or using the “Open” button.
You can also right click a PDF on your computer and select “Open With PDF Expert.”
Step 2: Select the Edit Tool
Click “Edit” in the toolbar at the top of your screen.
Click on any text block to start editing — fix typos, update numbers, or add new content.
You can change the font, size, and format of selected text.
✓ 检查点： You should see a blue border around the editable text area.
步骤三：保存更改
Press Cmd+S to save, or the app will auto-save your edits.
You can also export the edited PDF to a new file if you want to keep the original.
✅ 结果： Your PDF is now updated with all your text and image changes.
💡 专业提示： You can insert comments or add a new paragraph to your document without leaving the edit mode. Just click where you want the text and start typing.
如何使用 PDF Expert 注释 PDF
注释PDF lets you highlight text, underline key phrases, and mark up documents.
PDF Expert has all the annotation tools you need to review any file.
以下是使用步骤。
观看 PDF 注释功能演示：
现在让我们逐一分析每个步骤。
步骤 1：打开注释工具栏
Click the “Annotate” icon in the toolbar to reveal the annotation tools.
You’ll see options for highlighting, underlining, strikethrough, and more.
Step 2: Highlight or Underline Text
Select the highlight tool, then drag across the text you want to mark.
Choose your preferred color from the palette in the corner of the screen.
✓ 检查点： 选中的文本应以彩色背景显示。
Step 3: Add Shapes or Drawings
Use the pen or shape tools to draw circles or arrows on the page.
On iPad, you can use Apple Pencil for precise annotations.
✅ 结果： Your PDF now has clear visual markups for easy review.
💡 专业提示： PDF Expert allows you to highlight text, add comments, or write in the margins — all without leaving the annotate mode. Combine multiple pens with various colors for color-coded reviews.
如何使用 PDF Expert 标记和注释
标记和注释 lets you add sticky notes, stamps, and typed comments to any page.
You can easily type on a PDF to add your notes or comments in seconds.
以下是使用步骤。
观看标记和注释的实际应用：
现在让我们逐一分析每个步骤。
Step 1: Select the Notes Tool
Click the sticky note icon in the toolbar.
Then click anywhere on the page where you want to place your note.
Step 2: Type Your Note or Comment
A pop-up box appears where you can type your thoughts.
You can also add stamps to review documents or create custom stamps.
✓ 检查点： You should see a yellow note icon on the page.
Step 3: Review All Notes in the Sidebar
Click the sidebar icon to see all your notes and annotations listed together.
Jump to any note by clicking it in the sidebar list.
✅ 结果： Your PDF now has organized notes you can easily access and share.
💡 专业提示： Creating outlines in a PDF helps guide readers to the most important parts of the file. Use the outlines feature as a table of contents that serves as a digital map of your document.
如何使用 PDF Expert 转换 PDF 文件
转换PDF文件 lets you turn PDF files into Word, Excel, or image files with a few clicks.
You can also convert any JPG or PNG file to PDF with drag and drop.
以下是使用步骤。
观看转换 PDF 的实际操作演示：
现在让我们逐一分析每个步骤。
Step 1: Open the File You Want to Convert
Open your PDF document in PDF Expert.
Click “File” in the menu, then select “Export To” from the drop menu.
步骤 2：选择输出格式
Pick from Word, Excel, PowerPoint, or image formats like PNG and JPG.
You can turn PDFs into DOC files and easily edit them in Word.
You can also convert PDFs into image files for easy social sharing.
✓ 检查点： The export dialog should show your chosen format selected.
步骤 3：保存转换后的文件
Choose where to save on your computer, then click “Save.”
Your new file is ready to open in the target app.
✅ 结果： Your PDF is now converted to the format you need.
💡 专业提示： You can easily convert scanned documents to text using optical character recognition (OCR). The OCR software in PDF Expert turns scanned PDFs into fully editable and searchable text.
如何使用 PDF Expert 签署 PDF 文件
签署PDF文件 lets you sign documents in seconds using your Mac, iPad, or iPhone.
There are three simple ways to sign a PDF agreement or invoice with PDF Expert.
以下是使用步骤。
观看 Sign PDFs 的实际操作演示：
现在让我们逐一分析每个步骤。
Step 1: Open the Document to Sign
Open the PDF you need to sign in PDF Expert.
Click the “Sign” icon in the toolbar to start.
第二步：创建您的签名
Draw your signature using the trackpad, mouse, or Apple Pencil on iPad.
You can also upload a photo of your signature or type your name.
Your saved signature is stored for future use across all your 设备.
✓ 检查点： Your signature preview should appear in the sign panel.
Step 3: Place and Resize the Signature
Drag the signature to the correct spot on the document.
Resize it by pulling the corner handles, then click outside to confirm.
✅ 结果： Your document is now signed and ready to share or save.
💡 专业提示： Add your signature to the toolbar for fast access. This is the easiest way to sign multiple documents back to back without recreating it each time.
如何使用 PDF Expert 注释 PDF
评论PDF lets you insert pop-up comments and text boxes anywhere in a document.
PDF Expert makes it easy to collaborate on feedback with your team.
以下是使用步骤。
观看评论 PDF 的实际应用：
现在让我们逐一分析每个步骤。
步骤 1：选择评论工具
Click the speech bubble icon in the annotate toolbar.
Then click on the part of the page where you want to leave feedback.
Step 2: Write Your Comment
Type your feedback in the comment box that appears on screen.
You can copy and paste text into the comment if needed.
✓ 检查点： A small comment icon should appear on the page.
Step 3: Review All Comments
Open the sidebar to see a complete list of every comment in the file.
Click any comment to jump directly to its location in the document.
✅ 结果： Your document now has clear, organized feedback ready for review.
💡 专业提示： Use different colors for different reviewers. This makes it easy to track who left which comment when working on 商业 documents with your team.
如何使用 PDF Expert 添加图片
添加图片 lets you insert photos, logos, and graphics into any PDF page.
You can turn Word, Excel, or image files into PDF files in just a few clicks.
以下是使用步骤。
观看“添加图片”功能演示：
现在让我们逐一分析每个步骤。
Step 1: Switch to Edit Mode
Click “Edit” in the toolbar, then select the “Image” option.
You can also drag and drop an image file directly onto the page.
Step 2: Select and Place the Image
浏览 your computer for the JPG, PNG, or other image file you want to add.
Click “Open” and the image appears on your PDF page.
✓ 检查点： The image should appear with resize handles around it.
步骤 3：调整大小和位置
Drag the corner handles to resize the image to fit your layout.
Move it anywhere on the page by clicking and dragging.
✅ 结果： Your PDF now includes the new image exactly where you want it.
💡 专业提示： You can convert any JPG or PNG file to PDF with just a few clicks or a simple drag and drop. This is the fastest way to create PDF documents from image files.
如何使用 PDF Expert 管理页面
管理页面 lets you rearrange, rotate, delete, or split pages in any PDF.
You can organize PDF pages to improve navigation in your documents.
以下是使用步骤。
观看“管理页面”功能演示：
现在让我们逐一分析每个步骤。
步骤 1：打开页面缩略图
Click the grid icon in the toolbar to see thumbnail previews of all pages.
Each page appears as a small preview you can manage.
Step 2: Rearrange or Rotate Pages
Drag and drop any page thumbnail to rearrange the order.
Right click a page to rotate it 90 degrees or delete it entirely.
✓ 检查点： The page order should update 即刻 in the thumbnail view.
步骤三：提取或拆分页面
Select the pages you want, then click “Extract” to save them as a new PDF.
Adding page numbers helps readers navigate through the document easily.
✅ 结果： 您的PDF页面现在已按您需要的方式组织好了。
💡 专业提示： Hold Cmd and click to select multiple pages at once. This is the fastest way to delete or extract a batch of pages from a large document.
如何使用 PDF Expert 合并 PDF
合并PDF lets you combine multiple PDF documents into a single file.
Merging multiple PDFs into one can be done in seconds with PDF Expert.
以下是使用步骤。
观看合并 PDF 的实际操作演示：
现在让我们逐一分析每个步骤。
Step 1: Open the First PDF
Open the PDF that will be the starting point for your merged file.
Go to the page thumbnails view by clicking the grid icon.
步骤 2：添加更多文件
Drag additional PDF files from Finder directly into the thumbnail sidebar.
You can also click “Append File” to browse and select files from your computer.
✓ 检查点： All pages from every file should appear in the sidebar.
步骤 3：保存合并文档
Rearrange pages if needed, then press Cmd+S to save the combined PDF.
You can also export it as a new file to keep the originals unchanged.
✅ 结果： All your separate PDFs are now merged into one clean document.
💡 专业提示： You can combine PDFs to improve navigation in your documents. After merging, create an outline or table of contents so readers can easily access each section.
PDF专家专业技巧和快捷方式
经过两年多的PDF Expert测试，以下是我总结的最佳技巧。
键盘快捷键
| 行动 | 捷径 |
|---|---|
| Open a PDF file | Cmd + O |
| Save current document | Cmd + S |
| Copy selected text | Cmd + C |
| Find text in PDF | Cmd + F |
| Zoom in on page | Cmd + Plus |
| Zoom out on page | Cmd + Minus |
| 撤销上一步操作 | Cmd + Z |
| 打印文档 | Cmd + P |
大多数人错过的隐藏功能
- Split View Reading: Open two PDFs side by side to compare documents or reference one while editing another. Click “View” then “Split View” in the menu.
- Search History: PDF Expert saves your recent searches so you can easily access previous queries. Click the magnifying glass icon to see your search history.
- AI-Powered Summaries: Use the AI features to summarize lengthy documents, extract key points, and generate keywords from any PDF. This saves hours of reading time on long reports.
- Offline Translation: You can translate entire PDFs into different languages securely and offline within PDF Expert on iOS 18 and 之后.
PDF专家常犯的错误，请避免
Mistake #1: Editing a Scanned PDF Without Using OCR First
❌ 错误： Trying to select and edit text in a scanned document that hasn’t been processed with OCR.
✅ 右图： Run optical character recognition on scanned documents first. Then the text becomes editable and searchable.
Mistake #2: Not Saving Before Closing the App
❌ 错误： Closing PDF Expert without saving and losing all your edits and annotations.
✅ 右图： Press Cmd+S after every major change. PDF Expert does auto-save, but a manual save ensures nothing is lost.
Mistake #3: Sharing PDFs Without Redacting Sensitive Data
❌ 错误： Sending a PDF with credit card numbers, addresses, or personal info still visible.
✅ 右图： Use the redact tool to hide sensitive information before sharing. You can also password-protect documents to keep your data safe.
PDF专家故障排除
Problem: PDF Text Won’t Edit
原因： The PDF is a scanned image, not a text-based document. The app can’t detect editable text in image-only files.
使固定： Use the OCR feature to scan the document and convert it to editable text first. Then try editing again.
Problem: App Crashes When Opening Large Files
原因： Very large PDFs with hundreds of pages or heavy graphics can overwhelm available memory on your device.
使固定： Close other apps to free up memory. Update PDF Expert to the latest version. Try splitting the large file into smaller sections.
Problem: Signature Doesn’t Appear on Shared PDF
原因： The signature was placed as an annotation layer that gets flattened differently by some PDF readers.
使固定： Before sharing, go to File > Export and choose “Flatten Annotations.” This embeds the signature permanently into the PDF.
📌 笔记： If none of these fix your issue, contact PDF Expert support at support.readdle.com.
什么是PDF Expert？
PDF专家 is a PDF editor and reader app designed for editing, annotating, signing, and organizing documents on iPhone, iPad, and Mac.
你可以把它想象成一个专门为处理 PDF 文件而设计的文字处理器。
Whether you need to edit PDFs on Mac, fill out forms on iPad, or sign documents on iPhone, PDF Expert handles it all.
PDF Expert makes any PDF task fast and simple — from filling out forms to converting entire documents.
It has all the tools you need to edit and annotate PDFs the way you want.
PDF Expert has garnered accolades such as App of the Year Runner-up and 编辑‘ Choice by Apple.
观看这段快速概览：
它包含以下主要特点：
- 编辑PDF： Modify text, images, and links in any PDF document on your Mac or iOS device.
- 为PDF添加注释： Highlight text, underline, and add visual markups with the full set of annotation tools.
- 转换PDF： Turn PDF files into Word, Excel, PowerPoint, or image formats and back again.
- 签署PDF文件： Sign documents digitally and fill out PDF forms on any Apple device.
- 管理页面： Rearrange, rotate, delete, and split pages to organize your documents.
- 合并PDF文件： Combine multiple PDF files into one for easier navigation and sharing.
- OCR： Use optical character recognition to make scanned documents fully searchable and editable.
- 人工智能功能： Summarize lengthy documents, extract key points, and generate keywords with AI.
如需完整评测，请参阅我们的 PDF专家审核.
PDF专家定价
以下是 PDF Expert 在 2026 年的费用：
| 计划 | 价格 | 最适合 |
|---|---|---|
| 每周 | 每周 4.99 美元 | Short-term projects or quick PDF tasks |
| 每年 | 每周 1.53 美元 | 追求最佳性价比的普通用户 |
| 寿命 | $139.99 | Power users who want to pay once and own it forever |
免费试用： Yes — 7-day free trial available on all plans.
退款保证： Yes — available through the App Store refund process.
💰 性价比最高： Yearly plan at $1.53/week — you get every feature at the lowest per-week cost. The Lifetime plan is great if you plan to use PDF Expert for more than two years.
PDF Expert 与其他方案的比较
PDF Expert 与其他产品相比如何？以下是竞争格局：
| 工具 | 最适合 | 价格 | 等级 |
|---|---|---|---|
| PDF专家 | Mac and iOS PDF editing | 每周 1.53 美元 | ⭐ 4.6 |
| Foxit | Windows and cross-platform teams | 每月 10.99 美元 | ⭐ 4.5 |
| PdfFiller | 在线表格填写和签名 | 每月 8 美元 | ⭐ 4.5 |
| Tenorshare | 人工智能驱动的PDF工具 | 每月 4.49 美元 | ⭐ 4.3 |
| PDF元素 | Budget-friendly PDF editing | 每季度 11.99 美元 | ⭐ 3.9 |
| 硝基 PDF | Business document workflows | 每用户每月 15 美元 | ⭐ 3.8 |
| DocHub | 免费浏览器编辑 | 免费 - 每月 12 美元 | ⭐ 3.9 |
| 乌干达人民国防军 | Affordable cross-platform reader | 每年 39.99 美元 | ⭐ 3.7 |
快速精选：
- 综合最佳： PDF Expert — the fastest and most polished PDF app for Apple devices
- 最佳预算： DocHub — solid free plan for basic editing in your browser
- 最适合初学者： PdfFiller — simple interface for forms and signatures
- 最适合Windows用户： Foxit — the top alternative for PC users who need a full PDF editor
🎯 PDF Expert 的替代方案
正在寻找 PDF Expert 的替代方案？以下是一些最佳选择：
- 🚀 Foxit： A full-featured PDF editor for Windows and Mac with enterprise-grade tools, OCR, and AI-powered features. Great for cross-platform teams.
- 💰 PdfFiller: An online PDF editor focused on filling out forms, signing documents, and managing paperwork in the cloud. No download needed.
- 🧠 男高音份额： AI-powered software suite that includes PDF chat, AI writing, and document tools. Best for users who want AI built into their workflow.
- ⚡ PDF元素： Affordable PDF editor with editing, OCR, and form tools. Works on Windows, Mac, iOS, and 安卓 at a lower price point.
- 🏢 Nitro PDF： Business-focused PDF software with team collaboration, e-signatures, and analytics. Built for larger organizations.
- 🌟 DocHub： Free browser-based PDF editor for quick edits, form filling, and signing. No software to download or install on your computer.
- 🎨 UPDF： Cross-platform PDF reader and editor with AI features and annotation tools. Available on Windows, Mac, iOS, and Android.
完整列表请参见我们的 PDF Expert 的替代方案 指导。
⚔️ PDF专家对比
以下是PDF Expert与各竞争对手的对比：
- PDF Expert 对比 Foxit： PDF Expert wins on Mac and iOS with a cleaner interface. Foxit wins on Windows and offers more enterprise features for larger teams.
- PDF Expert vs PdfFiller: PDF Expert is better for desktop editing on Apple devices. PdfFiller is better for filling out forms online without installing software.
- PDF Expert 与 Tenorshare 的比较： PDF Expert has stronger core PDF editing tools. Tenorshare offers broader AI features beyond just PDF handling.
- PDF Expert 与 PDFelement 的对比： PDF Expert has a more polished Mac experience. PDFelement supports more platforms and costs less per year.
- PDF Expert 对比 Nitro PDF： PDF Expert is built for individuals on Apple devices. Nitro PDF is built for business teams needing collaboration and analytics tools.
- PDF Expert 与 DocHub： PDF Expert is a native desktop app with more power. DocHub runs in your browser with a free tier for light use.
- PDF Expert 与 UPDF： PDF Expert has better OCR and a more mature Mac app. UPDF offers broader platform support at a lower annual price.
立即开始使用 PDF Expert
您已学会如何使用 PDF Expert 的所有主要功能：
- ✅ 编辑PDF
- ✅ 注释 PDF
- ✅ 标记和注释
- ✅ 转换 PDF 文件
- ✅ 签署PDF文件
- ✅ 注释 PDF
- ✅ 添加图片
- ✅ 管理页面
- ✅ 合并PDF
下一步： 选择一项功能，立即试用。
大多数人都是从编辑PDF开始的。
只需不到5分钟。
常见问题解答
如何从 PDF Expert 中提取页面？
Open your PDF file in PDF Expert and go to the page thumbnail view. Select the pages you want to extract by holding Cmd and clicking each one. Then right click and choose “Extract” to save those pages as a new PDF document on your computer.
PDF专家可以编辑PDF文件吗？
Yes. PDF Expert allows you to modify text, images, and links in any PDF document. Click the “Edit” button in the toolbar, then click on any text or image to start making changes. You can fix typos, add new paragraphs, or update numbers directly in the file.
Adobe Acrobat 和 PDF Expert 有什么区别？
PDF Expert is designed specifically for Apple devices — Mac, iPad, and iPhone — with a clean, fast interface. Adobe Acrobat works on Windows and Mac but costs more and has a steeper learning curve. PDF Expert is the better choice if you use Apple devices and want an easier app to learn.
如何在PDF Expert中进行复制粘贴？
Select the text you want to copy by clicking and dragging across it. Press Cmd+C to copy the text. Navigate to where you want to paste it — either in the same PDF or another app — and press Cmd+V. You can also right click and select “Copy” from the menu.
PDF Expert 可以免费使用吗？
PDF Expert offers a free 7-day trial so you can explore every feature. After the trial, you need a paid plan. The Yearly plan works out to $1.53/week, and the Lifetime option is a one-time $139.99 payment. There is no permanent free plan, but the trial gives you full access to all tools.
PDF Expert 可以做什么？
PDF Expert lets you edit PDFs, annotate documents, sign contracts, fill out forms, convert files to Word or Excel, merge multiple PDFs, manage pages, and use OCR on scanned documents. It also includes AI-powered features for summarizing and translating content. Users can complete applications and tax forms digitally.
如何使用 PDF Expert 编辑 PDF 文件？
Open the PDF in the app and click the “Edit” button in the toolbar. Click on any text block to start changing it. You can also add new text, insert images, or edit links. When you’re done, press Cmd+S to save your changes or export the file.
如何激活 PDF Expert？
If you bought PDF Expert from the website, open the app and click “PDF Expert” in the menu bar. Select “License” and enter the license code from your confirmation email. If you bought from the App Store, your purchase is linked to your Apple ID and activates automatically.
如何在 PDF Expert 中进行剪切粘贴？
Switch to Edit mode by clicking the “Edit” button. Select the text or image you want to cut. Press Cmd+X to cut it, then click where you want to paste and press Cmd+V. This works for moving content within the same page or between different pages in the document.
PDF Expert容易上手吗？
Yes. PDF Expert is known for being one of the easiest PDF editors to learn. The interface is clean and the tools are grouped logically in the toolbar. Most users can start editing within minutes of downloading the app. It’s built to feel natural on Mac, iPad, and iPhone.
PDF Expert 比 Acrobat 更好吗？
For Apple users, PDF Expert is often the better choice. It’s faster, cheaper, and easier to use on Mac and iOS. Adobe Acrobat has more advanced features for enterprise workflows and works on Windows. If you only use Apple devices, PDF Expert gives you more value for less money.
PDF Expert值得购买吗？
Yes. If you work with PDF documents regularly on Mac, iPad, or iPhone, PDF Expert is worth the investment. The Yearly plan is affordable at $1.53/week, and the Lifetime plan pays for itself quickly. It handles every common PDF task without the high cost of Adobe Acrobat.
PDF Expert可以免费使用吗？
You can download PDF Expert and use it as a basic PDF reader for free. The free version lets you view and annotate documents. To unlock editing, signing, converting, and other premium features, you need a paid subscription or the Lifetime purchase.
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