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XMP is a tricky thing. There are two main ways to store XMP data. In a sidecar and by writing directly to the original image. Some people prefer one, others prefer the other. I try to avoid writing to the original because of the chance of data loss / corruption, which can definitely happen in these cases.
For proprietary RAW files, only sidecars are supported by apps (in general) due to their proprietary nature. For DNG, JPEG, etc., the XMP can be written inside (again, I don’t do that, but may in the future).
The name that Nitro uses for JPEG and DNG is _
.xmp. That’s to handle the case of RAW+JPEG. If you have an R+J pair and edit both of them, both would get named abc.xmp which would cause a collision. That’s why I use _ .xmp for DNG, JPEG, etc. However, this causes issues with other apps that aren’t doing that. There is also the problem of case-sensitivity. While macOS is not case-sensitive, iOS is, so the file name always uses lower-case convention. This is also what Adobe does. I do not understand why Graphic Converter would replace the JPEG with XMP – do you really mean that Graphic Converter replaces the JPEG with an XMP (rather than have two files)? That’s very odd.
Earlier in the app’s development it worked that way, but other beta testers were unhappy with that behavior. That’s because the image moves, and it made people have to hunt around the image. I will note your request, but I can’t promise anything.
Yes, I can see that, but it would complicate the UI. Right now, there is a single button: on / off. Adding a different choice requires a menu or something like, and crop is already complicated.
Smart Albums in Nitro are visible in Photos, but not in the Photos Smart Album area. In Photos, they appear in the Nitro folder. That’s because Apple does not allow apps to make Photos smart albums. I’m sure that was confusing. I’ll try again: Smart Albums in Nitro are regular Photos albums (like ratings albums), but they are treated specially in Nitro. Smart Albums made in Nitro appear in Photos with a weird series of letters and numbers. That’s expected (and has to do with the silliness I have to go through to make a “smart album” that’s not a true smart album.
You can’t remove an image from a Nitro smart album. You can only delete images from smart albums. This is also true for Photos Smart Albums (try it). That’s because a smart album must provide the correct search results.
Some apps may be able to read/write keywords in the library, but they are probably sold outside the App Store. Inside the App Store, apps are prohibited from accessing keywords (as keyword access is a private function in Photos).
That feature exists in the app. Go to Settings and look for Configure Editing Options. There is a button there. You can rearrange adjustments and also choose “Auto Collapse” to get the behavior you described.
I hope to add keywords to the Finder part of the app in the future. I need to figure out a few things first.
I cannot support keywords in Photos, even though Mac Photos lets you add them. That’s because Apple does not allow apps on the Mac App Store (yes, that’s right) to read or write keywords.
In general, I try to avoid implementing features on only one “half” of the app because it’s very confusing to people (especially when keywords are available inside the Photos app).
As far as Perspective goes, I suggest trying the vertical and horizontal sliders – that is an easy way to correct perspective.
