Who can rename a story map
In order to rename a story map, you must have Admin role on the particular story map. In case you are assigned as a Member for a story map, you need to contact the Admin of the story map who can rename it.
How to rename your story map
make sure you are the Admin of the story map
go to "Settings"
open "Admin settings"
rename your story map
Step-by-set guide to rename your story map
Open your story map and navigate to Settings > Admin settings.
Click to the name of the story map and update its name.