src/java.base/share/classes/sun/launcher/resources/launcher.properties

@@ -88,10 +88,16 @@
 \                  load native agent library by full pathname\n\
 \    -javaagent:<jarpath>[=<options>]\n\
 \                  load Java programming language agent, see java.lang.instrument\n\
 \    -splash:<imagepath>\n\
 \                  show splash screen with specified image\n\
+\                  HiDPI scaled image is also supported\n\
+\                  Unscaled image name i.e. image.ext should be passed to -splash option for all image types\n\
+\                  irrespective of HiDPI and Non-HiDPI\n\
+\                  Scaled image name convention:
+\                  Screen scale is float value e.g 1.25: image@125pct.ext\n\
+\                  Screen scale is integer value e.g. 2: image@200pct.ext and image@2x.ext both supported\n\
 \    @<filepath>   read options from the specified file\n\
 
 See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.
 
 # Translators please note do not translate the options themselves