如果有一种我喜欢的文件格式，那就是PDF。不要问我为什么，因为我无法解释。也许是文件的健壮性，它的各种功能，你似乎从来没有真正遇到过它的问题。这是一个可靠的文件标准，您知道您可以始终依赖它。
对于真正高级的功能，例如编辑、签名、某些加密功能等，需要花钱购买专业的 Adobe 软件(professional Adobe software)。但是对于大多数其他功能，如果您知道如何操作，则可以免费使用。这是Mac用户的指南。
PDF 文件的 Mac 用户指南
今天，我们将研究您可以对PDF文件执行的各种操作，例如制作一个、将两个或多个合并在一起、将页面拆分为单独的文件等。
制作 PDF 文件
让我们从最简单的开始 - 制作PDF文件。
在Mac(Mac)上制作 PDF不需要任何第三方软件。该功能已内置于操作系统中。您可以在打印(Print)功能中找到它。
- 打开要转换为PDF的文件。这可以是另一个文档、图像，等等。然后转到File–>Print以打开打印选项（或CMD + P，如果您喜欢使用键盘(keyboard)快捷键）。
您也可以选择“导出为PDF ”选项，但我发现如果您使用打印选项（例如图像对齐），您可以更好地控制完成的PDF文件。(PDF)
- 当打印预览框出现时，检查对齐。如您所见，我要转换为PDF文件的图像已被翻转。因此，单击方向(Orientation)选项将其转到右侧。
- 然后当对齐正确时，单击左下角的小PDF菜单并选择Save as PDF。
现在将要求您为文件命名并保存它。
(Merge Two)将两个或多个 PDF文件合并在一起(Files Together)（或添加更多(Add More)页面）
如果您有一个PDF文件并且想要添加更多页面怎么办？还是将两个PDF文件合并为一个？在Mac上，这很容易。
- 在Finder(Finder)中打开PDF文件，然后在View–>Thumbnails中打开Thumbnails视图。
- 现在使用鼠标或触控板，将要添加到PDF文件的文件、页面或图像拖动。将其拖到缩略图区域到您希望页面所在的部分。请注意，如果文件被锁定，您将无法执行此操作(Note you cannot do this if the file is locked)。
(Split)将PDF 文件拆分为单独的 PDF 文件(PDF File Into Separate PDF Files)
如果您有一个包含多个页面的PDF，并且您想将每个页面转换为单独的PDF文件，该怎么办？再次(Again)，非常容易。
- 与前面的示例一样，在Finder(Finder)中打开PDF文件并确保页面在缩略图部分可见。
- 使用鼠标或触控板，单击要提取为自己文件的页面的缩略图，然后将其拖出Finder窗口。
- 如果您现在查看您将页面拖到的Finder窗口，您将看到该页面保存为(Finder)PDF文件。它将（拖动）((dragged) )附加到文件名的末尾。
从 PDF 文件中提取图像
假设(Say)您有一个PDF文件，其中包含您想要保存为JPG或PNG的图像。你会怎么做呢？右键单击图像不起作用。
- 相反，右键单击包含图像的缩略图页面，然后单击Export As。
- 在底部选择JPG或PNG ，然后单击(PNG)Save。
该页面现在将保存为图像文件。您现在可以裁剪页面以仅保存图像而不保存其他任何内容。
从 PDF 文件中提取文本
在几乎所有情况下，您都可以通过使用触控板突出显示文本然后执行 CTRL + C 和 CTRL + V 组合来简单地复制和CTRL + CCTRL + V。格式甚至会为您保持完整（例如链接）。
唯一的缺点是线条可能需要调整，因为并非所有线条都是笔直的。
签署 PDF 文件
有许多在线服务可以让您“签署” PDF文件，例如DocuSign。您也可以使用 Mac 的Finder进行签名，但这可能是最糟糕的签名文件方式，因为您需要使用触控板。
相反，如果你有 iPad 等平板电脑，我发现最好的方法是使用艺术应用程序（或 Notes）签署你的名字。
然后截取签名，裁剪并保存为图像文件。
当您需要在PDF上签名时，将签名的图像文件复制并粘贴到PDF文件中。
How To Do Everything With PDF Files On Your Mac
If there is one file format whiсh І lоvе, it’s PDF. Don’t ask me why as I can’t really explain it. Maybe it’s the file’s robustness, its various features, how you nevеr really seem to have problems with it. It’s a solid file standard which you know you can always rely on.
For really advanced features such as editing, signing, certain encryption features, and so on, spending money on the professional Adobe software is required. But for most other features, you can do it for free if you know how to. Here’s a guide for Mac users.
The Mac User’s Guide To PDF Files
Today, we will be looking at various things you can do to a PDF file, such as making one, merging two or more together, splitting up the pages into separate files, and so on.
Making a PDF File
Let’s start with the easiest one of all – making a PDF file.
Making PDF’s on a Mac doesn’t require any third-party software. The functionality is already built into the operating system. And you can find it in the Print function.
- Open the file you want to turn into a PDF. This can be another document, an image, whatever. Then go to File–>Print to open the print options (or CMD + P if you like to use keyboard shortcuts).
You could alternatively select the “Export as PDF” option but I’ve found you get more control over the finished PDF file if you use the print option (such as alignment of images).
- When the print preview box comes up, check the alignment. As you can see, the image I want to turn into a PDF file has been flipped on its side. So click the Orientation option to turn it onto its right side.
- Then when the alignment is right, click the little PDF menu at the bottom-left corner and select Save as PDF.
You will now be asked to give your file a name and to save it.
Merge Two Or More PDF Files Together (Or Add More Pages)
What if you have a PDF file and you want to add more pages to it? Or merge two PDF files into one? On a Mac, this is easy.
- Open the PDF file in Finder and open the Thumbnails view in View–>Thumbnails.
- Now using your mouse or trackpad, drag the file, page or image you want to add to the PDF file. Drag it into the thumbnails area to the section where you want the page to go. Note you cannot do this if the file is locked.
- Remember to save the changes to the file before closing.
Split Up a PDF File Into Separate PDF Files
What if you have a PDF with multiple pages and you want to turn each page into its own separate PDF file? Again, very easy.
- As with the previous example, open up the PDF file in Finder and make sure the pages are visible in the thumbnails section.
- Using your mouse or trackpad, click on the thumbnail of the page you want to extract as its own file, and drag it out of the Finder window.
- If you now look in the Finder window you dragged the page to, you will see the page saved as a PDF file. It will have (dragged) attached to the end of the file name.
Extract The Images From a PDF File
Say you had a PDF file with an image inside that you wanted to save as a JPG or a PNG. How would you go about doing that? Right-clicking on the image doesn’t work.
- Instead, right-click on the thumbnail page containing the image and click Export As.
- Select JPG or PNG at the bottom and click Save.
The page will now be saved as an image file. You can now crop the page to only save the image and nothing else.
Extract The Text From a PDF File
In virtually all cases, you can simply copy and paste the text by highlighting it with your trackpad then doing the CTRL + C then CTRL + V combo. The formatting will even be kept intact for you (links for example).
The only slight downside is that the lines may need to be adjusted as not all of them will be straight.
Sign a PDF File
There are many online services where you can “sign” a PDF file, such as DocuSign. You can also sign using Mac’s Finder but that is probably the worst way to sign a file as you need to use your trackpad.
Instead, if you have a tablet such as an iPad, I have found that the best way is to sign your name using an art app (or Notes).
Then screenshot the signature, crop it and save it as an image file.
When you need a signature on a PDF, copy and paste the image file of the signature onto the PDF file.
