需要保留您在 Mac 屏幕上看到的内容？您可以通过截屏^{(taking a screenshot)}轻松做到这一点。但是，您可能仍需要剪切屏幕截图的某些部分以隐藏一些敏感信息或仅保留您需要的信息。 

如果您不确定在哪里可以找到裁剪工具或如何在Mac上裁剪屏幕截图，您可以尝试不同的方法，包括使用预览^(Preview)应用程序、第三方工具和在线服务。

如何使用裁剪工具在 Mac 上裁剪屏幕截图^{(How to Crop a Screenshot on Mac Using the Cropping Tool)}

通常，当您想在 Mac 上截屏时^{(take a screenshot on your Mac)}，您会使用热键或键盘快捷键^{(keyboard shortcuts)}，例如：

• Command + Shift + 3截取完整的屏幕截图
• Command + Shift + 4捕捉屏幕的一部分

1. 截取屏幕截图后，您可以点击屏幕右下方显示的缩略图来编辑图像。 

1. 接下来，选择裁剪^(Crop)工具。 

1. 拖动^(Drag)屏幕截图的裁剪手柄以创建要保留的区域的选择。

1. 选择完成^(Done)以保存裁剪的屏幕截图。

1. 或者，您可以等待屏幕截图出现在桌面上，将其打开，然后拖动光标选择您要保留的区域。 

1. 接下来，选择工具^(Tools)>裁剪^(Crop)。

1. 选择文件^(File)>保存^(Save)以保存屏幕截图。

如何在 Mac 上使用预览来裁剪屏幕截图^{(How to Use Preview to Crop a Screenshot on Mac)}

您可以使用 Preview 应用程序简单地查看^{(use the Preview app)}JPG和PNG等图像文件、各种文档以及编辑 PDF^{(editing PDFs)}。该应用程序具有多种编辑和标记功能，包括裁剪工具。 

如果您截取了屏幕截图或收到了无法在照片编辑应用^{(photo editing app)}中打开的屏幕截图，您可以使用“预览^(Preview)”来裁剪图像。 

1. 在预览^(Preview)中打开要裁剪的屏幕截图，然后选择显示标记工具栏^{(Show Markup Toolbar)}按钮。（在运行Big Sur的^{(Big Sur)}Mac上，它是带有铅笔尖图标的按钮，而在其他 macOS 版本上，它是带有工具箱图标的按钮）。

1. 单击^(Click)并拖动屏幕截图以创建选择，并根据需要拖动蓝点以调整其大小。 

1. 接下来，选择工具^(Tools)>裁剪^(Crop)以裁剪屏幕截图。 

如何使用照片应用程序在 Mac 上裁剪屏幕截图^{(How to Use Photos App to Crop a Screenshot on Mac)}

Mac上的照片^(Photos)应用程序可帮助您查找和整理所有照片，但它还具有直观的内置编辑工具，可用于调整照片大小、裁剪、缩放、GIF、变形甚至拼贴照片^{(collage your photos)}。 

1. 右键单击^{(Right-click)}屏幕截图并选择打开方式^{(Open with)}。

1. 接下来，选择照片^(Photos)。如果在上下文菜单的应用程序列表中没有看到照片，请选择^(Photos)打开方式^{(Open with)}>其他^(Other)，然后从应用程序^{(Applications)}列表中查找照片。^(Photos)

1. 您的屏幕截图将被导入照片^(Photos)应用程序。

1. 选择照片^(Photos)应用右上角的编辑。^(Edit)

1. 接下来，选择裁剪^(Crop)选项卡。

1. 拖动^(Drag)图像的边和裁剪手柄以裁剪它。 

1. 如果您要撤消任何更改，请选择左上角的恢复为原始。^{(Revert to Original)}

1. 选择完成^(Done)以保存裁剪的屏幕截图。

如何使用第三方工具在 Mac 上裁剪屏幕截图^{(How to Crop a Screenshot on Mac Using Third-Party Tools)}

您还可以使用Skitch^(Skitch) for Mac等第三方工具在Mac上裁剪屏幕截图。对于本指南，我们将向您展示如何使用Mac版 Skitch^(Skitch)来裁剪您的屏幕截图。

Skitch是一款简单的应用程序，可以轻松替换 Mac 自带的内置截图功能。您可以使用形状、文本、箭头和图章执行基本的裁剪和注释您的屏幕截图。

1. 下载并安装Skitch for Mac ，选择^(Mac)Screen Snap旁边的箭头，然后选择Open an image or PDF。

1. 选择左侧窗格中的裁剪工具，拖动图像的裁剪手柄进行裁剪，然后选择^(Crop)应用^(Apply)。 

1. 接下来，选择文件^(File)>导出^(Export)并将您的屏幕截图保存在所需位置。

您可以使用的其他工具包括Snagit，它是Mac和Adob​​e Photoshop的^{(Adobe Photoshop)}最佳截图工具之一（请参阅我们关于^{(best snipping tools for Mac)}如何在 Photoshop 中裁剪^{(how to crop in Photoshop)}的完整指南）。

如何使用在线工具在 Mac 上裁剪屏幕截图 ^{(How to Use Online Tools to Crop a Screenshot on Mac )}

如果您不想下载第三方应用程序，您可以使用IMG2Go、Picresize、ResizeImage或Cropp.me等在线工具来裁剪您的屏幕截图。对于本指南，我们将向您展示如何在Mac上使用IMG2Go裁剪屏幕截图。

IMG2Go是一款免费的在线工具，可让您安全地裁剪、编辑和转换多种不同格式的图像。 

1. 转到IMG2Go网站，选择选择文件^{(Choose File)}从硬盘上传您的屏幕截图。您还可以从云存储或通过URL上传图像文件。

1. 从顶部导航中选择裁剪选项。^{(cropping options)}

1. 接下来，选择应用^(Apply)以将更改应用到预览。 

1. 选择另存为^{( Save as)}下的箭头以选择您希望保存裁剪文件的格式、文件名和质量。

1. 选择保存^(Save)。

1. 等待^(Wait)该工具完成图像裁剪，然后单击“下载^(Download)”以下载转换后的图像。

专注于重要的事情^{(Focus on What Matters)}

裁剪屏幕截图可帮助您缩小到更有利的尺寸并专注于重要的细节。无论您选择哪种^(Whichever)方法或工具，您都应该能够自定义图像并直接加强关键点。

你有最喜欢的在Mac上裁剪屏幕截图的方式吗？在评论中与我们 分享。^(Share)

How to Crop a Screenshot on Mac

Need to preserve what you’re seeing on your Mac’s screen? You can do that easily by taking a screenshot.  However, you may still need to cut out some parts of the screenshot to hide some sensitive information or keep only what you need. 

If you’re not sure where to find the cropping tool or how to crop a screenshot on a Mac, you can try different methods including using the Preview app, third-party tools and online services.

How to Crop a Screenshot on Mac Using the Cropping Tool

Normally, when you want to take a screenshot on your Mac, you’d use hotkeys or keyboard shortcuts such as:

• Command + Shift + 3 to capture a full screenshot
• Command + Shift + 4 to capture a portion of your screen

1. Once you’ve taken your screenshot, you can tap on the thumbnail that appears on the bottom right side of your screen to edit the image. 

1. Next, select the Crop tool. 

1. Drag the crop handles of the screenshot to create a selection of the area you want to keep.

1. Select Done to save the cropped screenshot.

1. Alternatively, you can wait for the screenshot to appear on your desktop, open it and then drag the cursor to select the area you want to keep. 

1. Next, select Tools > Crop.

1. Select File > Save to save the screenshot.

How to Use Preview to Crop a Screenshot on Mac

You can use the Preview app for simple viewing of image files like JPG and PNG, various documents, and editing PDFs. The app has several editing and markup features, including a cropping tool. 

If you’ve taken a screenshot or you received one that you can’t open in a photo editing app, you can use Preview to crop the image. 

1. Open the screenshot you want to crop in Preview and then select Show Markup Toolbar button. (On a Mac running Big Sur, it’s the button with the pencil tip icon while on other macOS versions, it’s the button with the toolbox icon).

1. Click and drag on the screenshot to create a selection and drag the blue dots to resize it if you want. 

1. Next, select Tools > Crop to crop the screenshot. 

How to Use Photos App to Crop a Screenshot on Mac

The Photos app on your Mac helps you find and organize all your photos, but it also has intuitive, built-in editing tools you can use to resize, crop, zoom, GIF, warp and even collage your photos. 

1. Right-click the screenshot and select Open with.

1. Next, select Photos. If you don’t see Photos among the list of apps in the context menu, select Open with > Other and find Photos from the Applications list.

1. Your screenshot will be imported into the Photos app.

1. Select Edit at the top right corner of the Photos app.

1. Next, select the Crop tab.

1. Drag the sides and crop handles of the image to crop it. 

1. If there are any changes you’d like to undo, select Revert to Original at the top left side.

1. Select Done to save the cropped screenshot.

How to Crop a Screenshot on Mac Using Third-Party Tools

You can also use third-party tools like Skitch for Mac to crop screenshots on a Mac. For this guide, we’ll show you how to use Skitch for Mac to crop your screenshot.

Skitch is a simple app that can easily replace your Mac’s own built-in screenshot functions. You can perform basic cropping and annotate your screenshot with shapes, text, arrows and stamps.

1. Download and install Skitch for Mac, select the arrow next to Screen Snap and then select Open an image or PDF.

1. Select the Crop tool on the left pane, drag the crop handles of the image to crop it and select Apply. 

1. Next, select File > Export and save your screenshot in the desired location.

Other tools you can use include Snagit, which is one of the best snipping tools for Mac and Adobe Photoshop (see our full guide on how to crop in Photoshop).

How to Use Online Tools to Crop a Screenshot on Mac 

If you prefer not to download a third-party app, you can use online tools like IMG2Go, Picresize, ResizeImage or Cropp.me to crop your screenshot. For this guide, we’ll show you how to crop a screenshot on a Mac using IMG2Go.

IMG2Go is a free online tool that lets you crop, edit, and convert images in several different formats securely. 

1. Go to the IMG2Go website, select Choose File to upload your screenshot from your hard drive. You can also upload the image file from cloud storage or via a URL.

1. Select the cropping options from the top navigation.

1. Next, select Apply to apply the changes to the preview. 

1. Select the arrow under Save as to choose the format, filename and quality you’d like to save the cropped file in.

1. Select Save.

1. Wait for the tool to complete cropping your image and then click Download to download the converted image.

Focus on What Matters

Cropping screenshots helps you cut down to a more favorable size and focus on the details that matter. Whichever method or tool you choose, you should be able to customize your images and strengthen the key points directly.

Do you have a favorite way of cropping your screenshots on Mac? Share it with us in the comments. 

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