Hi Christian,
Once you take a snapshot you can preview it by pressing the preview button, as you said it will take you back to
the point in time when the snapshot was created.
Once you are in a 'preview' mode you have two options -
- commit - means that you want to go back to that state of the VM, it will cause all the data and snapshots that were taken after that point in time to be removed.
- undo - means that you don't want to go back to that point in time of the VM, so the VM will return to his latest state.