No, files only exist if saved, and the only way to keep content when Geany is closed is to save it in a file.
Note that `Preferences->Various->interface.new_document_after_close` controls if new `untitled`s get made or only one as @codebrainz noted. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/geany/geany/issues/2717#issuecomment-753685408