The File menu's save options and where project management is documented.
The File menu
Ceiling Coordination Studio uses the same File menu as the other tools:
Signed in: New, Load project, Save, Autosave (On / Off), Save as,
Rename, Export Image…. Signed out, the menu offers New, Sign in to save and
Export Image… — projects can only be saved to a signed-in account with a verified email.
Ctrl/Cmd+S saves the current project.
Older saved files
Projects saved by earlier versions of this tool keep opening correctly — missing fields
(rule set, linked-zones state, zone enabled flags, service and branch names) are filled in
automatically when the file loads.
Where to read more
Project management (creating, renaming, deleting, and organizing saved projects) and how
save/autosave status is shown are documented once, site-wide, rather than repeated per tool: