I've created a map journal application that is hosted on esri's server (not my own) which I've configured through the map journal builder. I'm realizing now that a splash page would be incredibly helpful, but do not want to start over in order to download the journal, edit, and host on my server.
Can I add such a thing through either the json in ArcGIS Online Assistant or by attaching the right code in the journal's settings under "code attachment"?
Alternatively, is there a way to download my application's source code for the journal storymap after I've finished editing in the builder? I see this is possible for the cascade, but can't find the option for the journal.