i made a page called test and added 4 button via html now when you run the app in the browser and check the different screen sizes (240x320, 320x480, ...)
you will see that its not show everything for example on the smallest screen and on the largest screen there is a lot of empty space.
what i want to know is does that mean i have to input different images for different screen sizes (and what about retina) and how to center the elements so that is looks all the same on the other screens (in other words how to detect different screen size & resolutions)
(project is shared with you guys -- City Mash)