Aspect ratio
The ratio of a screen's width to its height; 16:9 landscape and 9:16 portrait screens are the most common.
Aspect ratio is the ratio of a screen's or an image's width to its height. Most televisions and signage displays today are 16:9, and 1920×1080 pixels is the best-known resolution in that ratio. When the same screen is mounted vertically the ratio becomes 9:16 and content needs to be 1080×1920 pixels. Less commonly you will see 16:10, 4:3 or very wide stretched displays.
If the content ratio does not match the screen, the image leaves empty bars, gets cropped or looks stretched. That is why you should know the screen's ratio and orientation before you start designing.
Aspect ratio in MIA
In MIA each screen has an aspect ratio and an orientation. Ready layouts are prepared separately for landscape and portrait screens, and the Dikey bilgi ekranı (portrait information screen) design is 1080×1920. Orientation is added as a tag automatically, which makes it easy to send an item only to portrait screens. See the devices page for hardware options.