This will save the session including all of the movies that were in the session and  any drawings, notes, masks, colour adjustments and aspect ratio modifiers. Any chat will also be saved. 

The .csc file which is saved contains all the session data in XML format.

You can save a session at any time by selecting 'Save Session' from the Session menu.

 
Saved session files can be re-loaded later either for viewing via Load Session or for editing in online or offline session, and can be loaded on a different computer.

Saved session files can also be re-opened by double clicking the file.

Auto-Save settings

cineSync can be set to Auto-save at a user-defined interval. Auto-saving can be useful in cases where a connection is slightly unstable, ensuring that session data is always saved and that a session can be resurrected in the case of a loss of connection.

Auto save settings are set in the General tab in the Preferences menu.