You can choose from 10+ different themes for your Installer. In order to change the theme click to “Customize”->”Theme” and select your preferred theme. Once selected background of that theme will be green to indicate selected one.
Unfortunetely it is not easy to see differences between themes in our previews, that is why we recommend you to select one particular theme and build installer and check how that theme look. This the the right way to go. To speed up the process you can create a simple project and keep Building and Starting the installer.
For now Themes only apply to MetaInstaller