Editing picture variants
In this window you can select files that will be used as picture variants for different device screen resolutions.
Small (ldpi). Select a picture with resolution at least 140 dpi.
Normal (mdpi). Select a picture with resolution between 140 and 180 dpi.
Large (hdpi). Select a picture with resolution between 180 and 270 dpi.
Xlarge (xdpi). Select a picture to use on screens with resolution more than 270 dpi.
If the Template check box is selected for a picture variant, the picture is displayed on iOS devices in the current font color.
To finish editing picture variants, click OK.