Now I see what you mean:
With both options set, that Kirby Krieger mentioned
"Aperture➞Preferences➞General➞Automatically stack new versions", and
"Aperture➞Preferences➞Advanced➞Create new versions when making adjustments".
automatically a new version version will be created and stacked, whenever I add an adjustment. But that sequence gets broken, when I manually create a new version. When I start to edit this version all further edits are applied to this one version and no new versions are created and stacked.
I am not sure if that is supposed to be a bug or a feature 😕 - Kirby, what do you think? For me it looks like you can have only a fully automatic stacking, if you refrain from using "duplicate version". Once you create new versions on your own, you have to create new versions each time before you start editing and to manually stack the versions.
2. When I edit a photo, the versions are not stacked and the only way to go back to the original picture is to ask "Back to the master" (Revenir à l'original) in the contextual menu.
You can stack the versions on your own and you can undo the adjustments one by one, by unchecking them in the adjustment panel.
Regards
Léonie