config.lua
width = 320,
height = 480,
scale = "letterBox"
https://forums.solar2d.com/t/image-scaling/150116/10?u=ymmtny
width 1080, height 1620
https://coronalabs.com/blog/2018/08/08/understanding-content-scaling-in-corona/
https://forums.solar2d.com/t/from-the-blog-understanding-content-scaling-in-corona/348296
config.lua is always written assuming a portrait orientation
https://forums.solar2d.com/t/image-scaling/150116/
The 1.5 is a subtile change, but but instead of waiting until you have a 2160 to use the 2x images, you use them starting at 1620px screens
https://github.com/SpyricGames/Solar2D-Plugins-Public
Screen
build.settings
Default Landscape
page4.psd
iPad Air 1536 x 2048
=> landscape to portrait
User can see display objects at the center only when the device is rotated to portrait mode
iPhone X 1125x2436
=> landscape to portrait
page_portrait.psd
=> landscape to portrait
Default Portrait
page_portrait.psd
iPad 1536 x 2048
=> portrait to landscape
User can see the resized display objects and the black area both side
iPhone X 1125x2436
=> portrait to landscape
page4.psd
=> portrait to landscape
