The basic filtering by image attributes, uses AND logic - images are shown which meet all the criteria stated - and I don't think you can change this.
However, Smart Collections have a richer function. You can build a list of criteria statements, and set whether images are to be shown, of which ANY / ALL / NONE of those statements are true.
Bob: nicely done - except, it was not clear to me whether the OP was looking for:
- an OR operation - open selection - (A or B or both);
- an XOR operation - exclusive selection - (A but not B, or else B but not A; only).
It was also not clear to me whether "having a star"... is passed as a test, or failed, by something with TWO stars ... (grin)
We may never know as the OP has not replied. I assumed it was the scenario I filtered for and it worked in my tests. At least is was a fun excursion in boolean logic.
This does the trick, thanks. However, I don't really understand the function of a Smart Collection. Does it only apply to the folder you're using when you create it, or does it apply to your entire library?
I'm coming from Aperture where the search function was much more robust and intuitive.
The settings above would give me what I wanted-- ANY photo with either a rating of one star (or better) OR a color label of red.
A Smart Collection selects images from your entire library, disregarding their physical storage. It's not a means of filtering a prior selection e.g. coming from a physical folder.
Lightroom filtering is not quite so flexible, as is the screenshot you've shown from Aperture.
I am not sure I can imagine a use case myself for the particular example you've indicated, but given that it's something you want, there are fairly easy LR workarounds - provided you are prepared to not be too rigid or preconceived about the method.
For one example, you could click to filter down to one-star images, select all (keystroke cmd+A) and then add those to the Quick Collection (keystroke B). Then you could click to filter by colour label instead, and add those to the Quick Collection alongside the first ones. Then go to view the Quick Collection.
It's possible to text search on folder name as one of the criteria for a Smart Collection, but that whole aspect of LR is admittedly a lot less well developed IMO, than it could be. Perhaps if Aperture had remained in play, Adobe might have had their feet held a bit closer to that particular fire?
A smart collection applies to ALL the photos in your catalog. You can limit it to a single folder by including a FOLDER criteria in the smart collection definition.