Each save that changes the diagram keeps the previous version. The last 20 earlier versions are kept.
- In the editor, press History.
- Press Preview next to a version to see it.
- Press Restore this version to load it into the editor, then Save to make it current. Press Back to current to leave it as it was.
Note: Save or discard your changes before previewing older versions. Renaming a diagram doesn't create a version.