I have an iOS application supports iOS7+, i am using now Xcode 7.

I have multiple image sizes to use for iPhone 4s, 5, 6 and 6plus sizes...

I am using image assets in XCode, but i found only 3 image nodes: 1x, 2x and 3x.

[![enter image description here](https://i.stack.imgur.com/3vVlk.png)](https://i.stack.imgur.com/3vVlk.png)

How to manipulate these different sizes with these only three options in image assets?

Edit:
in the story board; i have single viewController (assumption), this viewController contains single image, how to create single image set and put all images in this set and in the run time, every device takes its suitable image size?

[![enter image description here](https://i.stack.imgur.com/zzIEJ.png)](https://i.stack.imgur.com/zzIEJ.png)