When you are ready to run your application in production mode, you may want to hide the ZIM prompt which is known as the backscreen.  You can change the setting dynamically using the $setproperty method.  You can also find the current setting using the $getproperty method.

backscreen hide yes | no

Specifies if the application window (BACKSCREEN) is hidden when the client session starts up.

Valid Settings

yes indicates the application window is hidden; no indicates the application window is not hidden at start-up. The default is always no.