Combining the history and snapshots would be interesting. How about 
placing a "S" marker at one end of the History entry as a separate 
entity when a snapshot is taken,Then just clicking on the marker would 
display the snapshot that is appropriate.

I also have had history losses (generally through my inattention)! Yes, 
better security on the history would be great.

David
On 13-12-17 03:14 AM, Per Östlund wrote:
> It would also be nice to somehow couple the history to the snapshot
> feature. As it is I find the snapshot feature somewhat useless, since
> you have to remember yourself what the difference between the snapshots
> are. I think that has been mentioned before on this list. I'm not sure
> what the best way to handle that would be, maybe add a button that
> replaces the current history with the snapshot's history.
>
> /Per Östlund
>
> On 2013-12-17 12:09, Jose Carlos Garcia Sogo wrote:
>> On Tue, Dec 17, 2013 at 9:05 AM, Pascal Obry <pas...@obry.net> wrote:
>>> During a teaching session on dt a user got caught by this:
>>>
>>> - select a point in history (to watch the evolution)
>>> - leave darkroom and go to lighttable
>>>
>>> The dev history above the last selected point is lost.
>>>
>>> Looks like a dangerous behavior to me. Has this been done on purpose?
>> The problem is that we are using history stack as an undo, which is
>> not the intended purpose. The same happens if you are looking at a
>> previous step of an image and you move a slider unadvertedly.
>>
>>> My proposal would be to remove the history only when clicking on the
>>> [compress history stack] button.
>> I basically would agree. Imposes more steps to discard history, but
>> stays on the safe side.
>>
>> Also, I would like to have a separate undo stack, in which all changes
>> to every slider are tracked. This is something I have discussed with
>> Johannes before. He says that our history module would do it by just
>> changing one define, but I still think we need some tweaking. Also I
>> am not sure that it makes sense to store in the XMP all the processing
>> history stack, which would happen in this case.
>>
>
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