-## ALSO SEE https://www.ej-technologies.com/resources/install4j/help/doc/#install4j.concepts.dmgStyling
+# Information for making the DMG
+## How to make the DS_Store file needed for the DMG prettification
+
+> ALSO SEE https://www.ej-technologies.com/resources/install4j/help/doc/#install4j.concepts.dmgStyling
+
+```
cp ../../build/install4j/11/Jalview-OFFLINE_macos-app_DEVELOPMENT-j11.dmg ./temp.dmg
hdiutil convert temp.dmg -format UDRW -o temp_rw.dmg
hdiutil resize -sectors $NEWSIZE temp_rw.dmg
open /Volumes/Jalview\ Installer
+```
+Then manually position/resize icons, extend size of Finder window, etc
-### Position/resize icons, extend size of Finder window, etc
-
-
+```
cp /Volumes/Jalview\ Installer/.DS_Store ./DS_Store_N
umount /Volumes/Jalview\ Installer
+```
+
+## Background image
+
+The vector version of this is made in Adobe Illustrator and saved as the pdf jalview_dmg_background_layers.pdf
+
+This is then exported as 300dpi PNG to jalview_dmg_background_large.png
+
+This is then converted to the right size, with DPI information removed with ImageMagick
+```
+convert -geometry 500x461 utils/install4j/jalview_dmg_background_large.png -strip utils/install4j/jalview_dmg_background.png
+```