Can several people work on a file at once?

Yes. Share the file, and everyone who opens it sees the same content update live

• The avatars at the top show who is in the file and whether they are editing or viewing
• Up to 8 people can edit at the same time and up to 20 more can watch
• In documents, switch on Edit → Suggesting to propose changes instead of making them. Others can accept or reject each one
• Mention someone with @ in a document comment and they get a notification in Air9