P: Constrain to crop - always ON via an option.

As architecture photographer I usually crop manually. I wish Content-Aware Fill will soon be available to fill those white corners. Crop is sometimes delicate thing.

Also, Auto Upright seems to constrain crop automatically, without option to reveal cropped area. It is sometimes a nuisance.

Generally, option to set default behaviour, or remembering last setting would be preferable. Also in other dialogs: it is totally unnecessary work to click hundreds ot times "content aware fill blank areas" in panorama dialog, every time, when all of my shots are multi-. 

A simple fix would be for Constrain Crop/Constrain To Image to remember its last setting, in the same way that Crop Lock is remembered. 

YES. Any time you use transform you end up with white borders that need to be cropped. I can't imagine the scenario where I don't want the box checked.

Ditto. I don't think there is ever a case where I've used transform and NOT had to crop to eliminate white space. It should default to ON, with an option to uncheck it.

I would assume that @Claire343137048sos  idea would mark all the images as "has edits" thus rendering that badge, filter and Smart Colleciton option meaningless.

Hey, its kind of an old topic but I was struggling with this too and found an easy workaround in case you're still struggling. select all your pics, then choose one pic with no modification in the transform menu but click on constrain, then sync only the transform with all your other pics (so of course, to do at the beginning before you start transforming and turning them) and voila, it's all auto checked. Sooo useful when I work with my loupedeck !

It would be if the Constrain Crop tick box was ticked by default. In years of using Lightroom I have never done a crop that didn't need constraining. 

I'm not heavily into presets and not consistent about their use. Nor does it matter much. Because: photos can easily be edited as a group e.g. with AutoSync, and not only by the use of presets but also manual changes experimentally done. Say the same update is to go onto forty photos as a first approximation: surely it's preferable to perform these changes just once affecting those 40 photos, than to repeat performing them 40 times?

Interesting. So essentially, you're rarely using that panel, you are only using your presets? Good idea.

I also have a preset dedicated to each of the Upright options, and those include ensuring Constrain is ON.