LIGHTROOM 4.2: Constrain Crop sometimes works backwards

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  • Updated 5 years ago
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Lightroom 4.2, Windows 7 Home Premium 64 bit. In the Lens Corrections Panel, sometimes the "Constrain Crop" function behaves backwards ... in other words, if you check Constrain Crop, it does not constraint crop; and if you uncheck Constrain Crop, the crop is properly constrained. This is an intermittent problem, the problem does not happen for all photos.

In the first screen capture, you can see that in the history panel, I have selected "Crop Constrain to Warp" set to No, but the image is constrained properly.


In the second screen capture, you can see that in the history panel, I have select "Crop Constrain to Warp" to Yes, and the image is NOT properly constrained.
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Paige Miller

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Posted 6 years ago

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Steve Sprengel, Champion

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Turning off Constrain Crop does NOT change anything for the current view--it just won't further be constrained when new geometry adjustments are made.

Are you saying that stepping backwards in history doesn't do things correctly regarding Constrain Crop or are you saying that Constrain Crop doesn't work properly even when history isn't involved, with the latter being more serious.

To test history differently, go back before the Constrain Crop enabled and then go forward in history one by one and see if that works.
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Paige Miller

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Steve, you can see the sequence of events and what it does to the image. Stepping backwards doesn't make the image appear properly. Actually doing it for the first time didn't make the image appear properly, and then going backwards didn't make the image appear properly.

And yes I tried going back before the first Constrain Crop and tried the sequence of steps again; going forward didn't work right, and going backward through history didn't work right. This is all very repeatable on this image and a few other images; but not repeatable on other images.
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Steve Sprengel, Champion

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I see in your history that the Constrain Crop appears to have been applied twice in a row without an intervening No, just an Export in between, so something appears to be wrong with the history.

Did the Constrain Crop before the Export work ok?
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Paige Miller

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Steve, thanks for looking into this so carefully, but that is another symptom of the issue. I agree that there is something wrong with the history as well as something wrong with the Constrain Crop feature. The constrain crop didn't work properly before the export.

There are instances where you can check the dialog box next to Constrain Crop, the History then says Yes, but no constrain has happened, and the box that I checked appears unchecked!!!! You can see that has happened in my screen shots above. You can click that box again, and get a 2nd Yes in a row, sometimes the check mark appears, but the constrain doesn't happen. If I then uncheck the check box, the constrain happens.

See this screen capture


All of this is very odd. I would say this has happened on about 5% of the images I have edited recently, but once it happens on an image, I cannot get it to behave correctly.
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Michele Albrigo

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Lens correction / Manual / Constrain Crop does not always work as intended. Maybe due to interface speed, activating/deactivating the Constrain Crop flag does not always lead to change in the displayed image, sometimes it starts even acting the opposite way as intended, or appears to do so.

This reply was created from a merged topic originally titled
Constrain Crop flag acting weird.
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Gethin Coles

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Denny Wells

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This just happened to me too. Lightroom 4.4. Windows 7.

Hit "Constrain to Crop" and it briefly flickers a properly cropped image, but then returns to the un-cropped view. Constrain to crop = yes in history and the checkbox is checked. Go to another image and come back, and history is unchanged, and the image is still un-cropped, but the constraint to crop checkbox is now empty. Clicking the constrain to crop checkbox again yields the same result, and puts Constrain to crop = yes in the history in 2 consecutive entries.

Have tried a couple of Microsoft solutions (closing things down and restarting) to no avail. Maybe this is the prodding I need to upgrade to LR 5 and keep my fingers crossed that this bug is fixed there.