在预览模式中截屏
在Finder的应用文件中找到它，双击此键。  "选定区域会让你的光标变成一个十字。点击并拖至出现你想截取的矩形区域。    {"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/24\/Take-a-Screenshot-With-a-Macbook-Step-13Bullet1.jpg\/v4-460px-Take-a-Screenshot-With-a-Macbook-Step-13Bullet1.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/2\/24\/Take-a-Screenshot-With-a-Macbook-Step-13Bullet1.jpg","smallWidth":460,"smallHeight":283,"bigWidth":760,"bigHeight":467.77464788732397,"licensing":"<div class=\"mw-parser-output\"><\/div>"}  "窗口"会让你的光标变成一个相机键。选中你想截取的窗口并点击。    {"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/9\/93\/Take-a-Screenshot-With-a-Macbook-Step-13Bullet2.jpg\/v4-460px-Take-a-Screenshot-With-a-Macbook-Step-13Bullet2.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/9\/93\/Take-a-Screenshot-With-a-Macbook-Step-13Bullet2.jpg","smallWidth":460,"smallHeight":286,"bigWidth":760,"bigHeight":472.55014326647563,"licensing":"<div class=\"mw-parser-output\"><\/div>"}  "整个屏幕" 会开始倒数。将屏幕整理成你想的样子，等待倒计时。    {"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/b\/b8\/Take-a-Screenshot-With-a-Macbook-Step-13Bullet3.jpg\/v4-460px-Take-a-Screenshot-With-a-Macbook-Step-13Bullet3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/b\/b8\/Take-a-Screenshot-With-a-Macbook-Step-13Bullet3.jpg","smallWidth":460,"smallHeight":306,"bigWidth":760,"bigHeight":505.10769230769233,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 截屏会立即作为一个未命名的预览图片打开。打开文件菜单并选择“保存”。给它命名，选择保存地点和文件类型，然后点击“保存”。
打开预览模式。 打开文件菜单，将你的光标移到截屏上。 选择“选定区域”、“窗口”或“整个屏幕”。 保存你的新图片。
https://www.wikihow.com/Take-a-Screenshot-with-a-MacBook
Take a Screenshot in Preview