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Heidi Jermyn Heidi Jermyn695 Points
Explain 1x versus 2x images
Hey there, can you elaborate on what 1x images and 2x images are.
Jonathan GrieveTreehouse Moderator 90,705 Points
2x images are generally images that are optimised for retina screens. They're scaled to twice the size of 1x images but since retina screens have twice the pixel ratio of most other screens they output the same size visually as 1x.
So a 25px image in width and height will look the same as a 50px width and height image in 2x. :-)
Zoltán Holik3,401 Points
Here is an article about picture scaling for normal and for retina display: