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You are right. Just tried it in CC and CS6. In CS6 the curve shape updates in its properties panel as you step backwards with Ctrl Alt z. In CC if you change the curve shape; click on another layer, then go back to Curves and change the shape, and repeat this a few times. If you step back with Ctrl Alt z, the image changes, but the shape of the curve in the Properties panel stays the same. You have to come out and go back to the Curve in properties panel to update the new shape. Looks like a bug.
Thank you for your response. I am glad to know that I'm not the only person that is experiencing this.
Hopefully an Adobe representative can chime in shortly to acknowledge this issue so that it can be rectified as soon as possible. Whilst quite a simple command, this toggle function is a part of my workflow that I depend on heavily.
The bug seems to be with ALL ADJUSTMENT LAYERS .... not just curves.
Just repeating what's already been said above.
Having the same problem with Photoshop CC, tricky to explain this one:
Working in Curves and/or Selective Color Adjustment layers (probably in any adjustment layer) is very buggy.
When I do a change f.ex. let's say I'm tweaking inside curves and undo my last change it does reflect it on screen but not in the dialog/palette. So when I do my next tweak both my old tweak (not reflected on screen anymore but still there) and the new one goes into effect.
It's driving me nuts and have forced me to go back to CS6.
2 x 2.8 Ghz Quad-Core Intel Xeon
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I see the behavior difference you describe, and will open a bug for this. It clearly is a problem that was introduced somewhere between CS6 and CC. The CS6 behavior, of course, is correct.
I'm having the same issue
I see this was posted June 27, exactly a month ago....any news on when they might fix this bug? I'm like Elderlad I use this keyboard command constantly in my work flow. Thanks for keeping us up to date!
I can't comment on the dates or features of future releases of Photoshop, but this is a high priority bug because it affects a large number of users and is really bad behavior.
Good to know it's high priority, thanks! And yes, it's very bad behavior!
Casting my vote as someone waiting for a fix to this.
ALL SORTED WITH THE LATEST PHOTOSHOP UPDATE!!!
Ha! Yeah, I saw that too on my last update a couple days ago. YAHOO!
Still getting the problem although Photoshop is telling me it's up to date.
I started this thread when CC came in and with the later update it fixed the problem.
Since updating Photoshop tonight (and updating to Mavericks), a similar problem with adjustment layers is happening again.
When Levels, Curves etc. are applied as an "adjustment layer", if a change is made (such as a new modification point, or changed slider), the "undo" function is disabled.
This means if you accidentally change the modification point to a place you do not like it, you are unable to go back to the original point.
It also means that in order to delete a new modification point, you must slide it off the top of the curve in order to remove it (rather than undo)
Adobe, can we please have this issue resolved asap.
Turns out it could be an issue with having a Wacom connected