The History button on the button bar (or option on the context menu) will allow you to view the revision history for the current object. You can rollback to any previous version of an object, but beware that table data isn't logged and will be lost, and dependant objects such as triggers and indexes will also be lost - these should be recoverable using the Gravyard though...
The Graveyard button allows you to browse the latest versions of all objects that are in revision control, but *not* in the current database - in other words, anything that has been deleted. You can restore these objects as you wish - this will also restore their revision history if they have one. Be warned: The Revision Control system is *not* a backup system, and may have yet-to-be-found bugs. Make sure you take and keep regular backups in case something goes wrong! Regards, Dave.