I have an image that has some CSS: `width:100%;`

Now the image is around `560px` high, but I wish to only select 300px of the image, cutting off the top and bottom of the image without squashing it.

Is it possible to do this? 

I have looked at `crop` but you have to select the portions to do this, and so it won't work when trying to get just the middle.

![Example of image cropping desired](https://i.stack.imgur.com/nK9yk.jpg)