当Adob(Adobe) e的联合创始人John Warnock开发可移植文档格式(Document Format)( PDF ) 时，他希望让人们更轻松地分发文档而无需打印它们。令人惊讶的是，它并没有变得非常用户友好。
不仅文件很大，而且格式不支持外部超链接，只能使用特殊的PDF 查看器查看(PDF viewer)。随着时间的推移，各种版本的PDF文件格式中都包含了功能改进，使其更易于使用。
但是，对 PDF 文档(edit a PDF document)进行更改或编辑仍然不像大多数其他文本文档那样容易，因为它们并不是真的要被编辑的。
大多数 PDF从(start from a source file)另一种本机格式（如Word ）的源文件开始，然后转换为PDF文件格式以进行分发。如果您不是原作者，编辑文件会有点困难，因为源文件对您不可用，或者您没有合适的应用程序来编辑它。
好消息是有几种方法可以编辑PDF文档。我们将向您展示使之成为可能的四种出色工具。
使用 Adobe Acrobat
Adobe Acrobat是最明显的PDF(PDFs)编辑工具。与 Adobe 的大多数产品一样，您可以通过购买标准(Standard)版或专业(Pro)版编辑器轻松地在线获取它。
如果您不想付费，可以注册 7 天免费试用并访问 Acrobat DC 的强大功能。
要开始编辑PDF，您需要在 Adobe Acrobat 中打开文件。
转到文件(File)>打开。(Open.)
在右侧窗格中
选择编辑 PDF工具。(Edit PDF)
单击(Click)您要编辑的文本或图像。Acrobat将显示格式化文本所需的所有编辑工具。(editing tools)
注意：(Note:)如果您要使用某种特定字体，并且该字体既未安装也未嵌入系统中，则您无法编辑(can’t edit any text)PDF文档中的任何文本。对于嵌入字体，您只能更改字体大小和颜色。
完成更改后保存文件。
您可以使用Adobe Acrobat在(Adobe Acrobat)Windows和Mac客户端中编辑PDF文档。此外，如果您订阅了Acrobat Pro DC ，您可以使用(Acrobat Pro DC)Acrobat Reader 移动应用程序(Acrobat Reader mobile app)在任何设备上随时随地在Android和 iOS上编辑PDF(PDFs)。
使用微软 Word
如果您已经拥有最新版本的Microsoft Word（2013 或更高版本），这是基于现有PDF编辑文档的最简单、最快捷的方法。
这两种格式在本质上是不同的，这意味着某些信息（例如带有单元格间距的表格、字体效果、表单填写(form-fill-in)功能等）可能会在翻译中丢失。
首先，打开Microsoft Word程序并单击文件。(File.)
单击打开(Open)以从文档窗口中选择要编辑的PDF文件。(PDF)
您将收到一条消息，说明Word会将您的PDF转换为可编辑的文档，并将其内容转换为Word可以显示的格式。但它不会更改原始PDF。
单击确定(OK)。对文档进行所需的更改，然后单击“File>Save ”将其保存回 PDF 格式。
使用谷歌文档
这是编辑PDF(PDF)文件的一种快速且易于使用的替代方法。以下是您在Google 文档中编辑(Google Docs)PDF(PDFs)所需采取的步骤。
(Log)使用您的Google帐户(Google)登录Google Drive 。(Google Drive)点击(Click)左上角的新建。(New)
选择文件上传(File Upload)。
在文档窗口中，找到您要编辑的PDF文件，然后单击(PDF)打开(Open)。上传完成后，单击左侧窗格中的“最近(Recent)”以查找您刚刚上传的PDF 。
右键单击PDF文件名并选择Open With>Google Docs。
将创建 一个新的、可编辑的Docs文件。(Docs)
双击(Double)它以进行必要的更改并将其下载为PDF。您还可以使用可共享链接通过电子邮件发送或与他人共享。(share it with others)
使用 PDF 编辑器
找到一个可以让您编辑、添加或修改文本和图像、签名、填写表格等的PDF编辑器并不容易。(PDF)但是，您可以使用一些在线PDF编辑器与您的网络浏览器一起编辑您的(PDF)PDF文件，然后将其保存回您的计算机或云存储，或与他人共享。
并非所有PDF编辑都提供相同的功能；有些对您能做什么和不能做什么有限制，但您可以使用多个工具来处理同一个PDF文档。它们也不像Acrobat等桌面(Acrobat)PDF编辑器那样功能齐全，因此它们不会完美转换，这意味着您会留下奇怪的格式样式和不正确的翻译。
您可以使用的众多在线PDF编辑器之一是(PDF)Sejda PDF编辑器。一个额外的事实是它可以完全在您的网络浏览器上运行，或者您可以获得桌面版本。
只需访问 Sejda PDF 的网站，然后单击编辑和签名(Edit & Sign)列下的PDF 编辑器。(PDF Editor)
在那里，上传您要编辑的PDF文件。(PDF)您可以单击绿色的上传 PDF 文件(Upload PDF file)按钮从您的计算机上传文件。
您还可以通过单击下拉菜单并从Google Drive、Dropbox、OneDrive或网址(Web Address)( URL ) 上传来选择位置。
注意：(Note:)桌面版不允许您通过URL或在线存储服务添加 PDF。
您现在拥有可编辑的文档格式。与Acrobat一样，Sejda PDF编辑器提供了一个带有编辑工具(editing tools)的菜单，您可以使用这些工具来使用不同的字体、颜色或大小来格式化您的文本。
进行所需的更改，然后单击屏幕底部中心的应用更改（绿色按钮）。(Apply Changes)
不用担心您的文件会存储在 Internet 上。Sejda会在两小时后自动删除所有上传的文件。您也可以通过单击删除文件(Delete Files )图标自行删除它。
这些方法是PDF编辑的良好开端，应该足以满足大多数用户的需求。
4 Ways To Edit a PDF File
When Jоhn Warnock, co-founder of Adobe, developed the Portable Document Format (PDF), he wanted to makе it easier for people to distribute docυments without the need to print them. Surprisingly, it didn’t turn out to be verу user-friendly.
Not only were the files large in size, but the format didn’t support external hyperlinks and could only be viewed with a special PDF viewer. Over time, functional improvements were included in various versions of the PDF file format that made it easier to work with.
However, it’s still not as easy to make changes to or edit a PDF document like most other text documents, because they weren’t really meant to be edited.
Most PDFs start from a source file in another native format like Word, and are converted to the PDF file format for distribution. If you’re not the original author, it’ll be a little more difficult to edit the file either because the source file isn’t available to you, or you don’t have the right apps to edit it.
The good news is that there are several ways to edit a PDF document. We’re going to show you four great tools that make it possible.
Using Adobe Acrobat
Adobe Acrobat is the most obvious tool for editing PDFs. Like most of Adobe’s offerings, you can easily get it online by purchasing the Standard or Pro versions of the editor.
If you don’t want to pay for it, you can sign up for the 7-day free trial and access Acrobat DC’s powerful features.
To start editing your PDF, you need to open the file in Adobe
Acrobat.
Go to File>Open.
Select the Edit PDF tool in the right pane.
Click on the text or image you’d like to edit. Acrobat will display all the editing tools you’ll need to format your text.
Note: If there’s a particular font you want to use, and it’s neither installed nor embedded in your system, you can’t edit any text in your PDF document. For embedded fonts, you can only change the font size and color.
Save your file once you’re done making the changes.
You can use Adobe Acrobat to edit PDF documents in Windows and Mac clients. Plus, if you have an Acrobat Pro DC subscription, you can edit PDFs on Android and iOS from anywhere, on any device using theAcrobat Reader mobile app.
Using Microsoft Word
If you already own recent versions of Microsoft Word (2013 or later), it’s the easiest and quickest way to edit a document based on an existing PDF.
The two formats are different in nature, which means some information like tables with cell spacing, font effects, form-fill-in features and more may get lost in translation.
First, open Microsoft Word program and click File.
Click Open to select the PDF file you want to edit from the document window.
You’ll get a message saying Word will convert your PDF to an editable document, and its contents into a format that Word can display. It won’t change the original PDF though.
Click OK. Make the changes you want on the document, and click File>Save to save it back to PDF format.
Using Google Docs
This is a quick and easy to use alternative to editing PDF files. Here are the steps you need to take to edit PDFs in Google Docs.
Log into Google Drive with your Google account. Click New on the upper left hand side.
Select File Upload.
In the document window, find the PDF file you want to edit and click Open. Once the upload completes, click Recent on the left pane to find the PDF you just uploaded.
Right click on the PDF file name and select Open With>Google Docs.
A new, editable Docs file will be created.
Double click on it to make the necessary changes and download it as a PDF. You can also email or share it with others using a shareable link.
Using a PDF Editor
Finding a PDF editor that lets you edit, add or modify text and images, sign your name, fill forms and more isn’t easy. However, there are some online PDF editors you can use with your web browser to edit your PDF file and then save it back to your computer or cloud storage, or share it with others.
Not all PDF edits offer the same features; some have restrictions on what you can and can’t do, but you can use more than one tool to process the same PDF document. They’re also not as fully featured as desktop PDF editors like Acrobat so they won’t convert perfectly, meaning you’re left with odd formatting styles and incorrect translations.
One of the many online PDF editors you can use isSejda PDF editor. A bonus fact is it can run entirely on your web browser, or you can get the desktop version.
Just go to Sejda PDF’s website, and click PDF Editor under the Edit & Sign column.
There, upload the PDF file you want to edit. You can click on the green Upload PDF file button to upload your file from your computer.
You can also select a location by clicking the drop down menu and upload from Google Drive, Dropbox, OneDrive or a Web Address (URL).
Note: The desktop edition doesn’t let you add PDFs by URL or online storage services.
You now have an editable format of your document. Like Acrobat, Sejda PDF editor offers a menu with editing tools you can use to format your text using different fonts, colors, or sizes.
Make the changes you want and then click Apply Changes (green button) at the bottom center of your screen.
Don’t worry about your files getting stored on the internet. Sejda deletes all uploaded files automatically after two hours. You can also delete it yourself by clicking Delete Files icon.
These methods are a good start to PDF editing and should be enough to cover the needs of most users.
