See description above, notes version of history and a snapshot of the notebook function is the same, you want to use notes version history feature, you need to save the notebook snapshot alone can not only give some notes historical version. To view the historical version of the notes:

- in the notes on the right-click menu, select [History Version]
- select a note, open the menu [Network] [History]

History Version dialog box pop-up notes, YodaNote will download the revision history of the notes, you may need a few seconds, and then in the lower right corner of the version list "will list all version by clicking on these dates will be able to control these version of the content.
Created due to some snapshots of the notes may not create the content displayed is empty.
If you need to use a historical version, overwrite the current version, you need to be right on that date, select [Replace].
Note: and replaced using historical version will overwrite the current version.