Download this iMac vector and open the .AI file in Illustrator. Select the iMac using the Selection Tool (V), copy it (Ctrl/Cmd + C), go back to Photoshop and paste it as smart object (Ctrl/Cmd + V). Name this layer "imac" and use Free Transform (Ctrl/Cmd + T) to change its size. Take a look at the following image for reference.
下载这个iMac矢量图，并在Illustrator中打开.AI文件。用选择工具选择iMac，复制它（Ctrl/Cmd + C），回到PS并粘贴为智能对象（Ctrl/Cmd + V）。命名此图层为iMac，并用自由变换（Ctrl/Cmd + T）改变它的大小。看看下面的图片，以供参考。
Select the Rectangle Tool (U) and create a rectangle over the computer screen. Name this layer "image_holder". Then open in Photoshop an image that you want to display on the screen and move it into your initial document using the Move Tool (V). Name this layer "image", put it over the screen, right-click on it and select Create Clipping Mask.
用矩形工具创建一个矩形覆盖计算机图像的屏幕。命名此图层为image_holder。在PS中打开你想显示在屏幕中的图像，用 移动工具 移到你的文档。命名此图层为image，把它移到屏幕的上方，右键选择 创建剪贴蒙版 。
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