What size should be the layout in Photoshop for Iphone 5?

Question

iPhone

Hello! The question seems to be simple, but I could not really find an answer to it. What size should be the layout in Photoshop for Iphone 5? In fact, the iphone 5 has a width of 640, but the retina is multiplied by 2, that is, the design should be done under 320? or how? Thanks for the answer!

Answer 1

Under 320, but save the entire raster through export for the web with the creation of copies of their images in size 2x. In the latest versions of the shop there is such a function (right-click on the layer with the picture - export).