A tutorial on how to create a thumbnail grid with an expanding image preview similar to the effect seen on Google Images.

一个教程就如何为扩展图像预览类似于谷歌图像中看到的创建缩略图的效果。

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When looking at the thumbnail grid of images that appear beside one large image, select a bunch of photos at once by holding one finger on the first image in that group and a second finger on the last image.

WSJ: The Digital Solution: Letting Your Fingers Do the Photo Editing