Share your diagram and make live changes to it together with your peers, à la Google Suite.
Type in the email address(es) of your peer(s)
Select level of access:
"Can Edit" or
Modify diagram permissions
Version History allows you to access different versions of your saved diagram, and roll-back if you need to.
Click the Saving prompts
Navigate through the versions
Choose the versions you'd like to restore
Restore this version