Some times it is good to know how to do certain things and save quite a bit of clicks when working with images. In this case with cropping:
I was recently pondering about how to automatically generate certain images into a specific resolution. This I need for a website I am currently working on. So I found this feature in Adobe Photoshop that will save me a lot of time!!
Here is a very good video that explains how to generate image assets from layers
There’s also this post called Introducing Adobe Generator for Photoshop CC which has a very good into video: