Small photos in Photos (iMac 10.15.6) enlarged to fit screen - fix available?
Somewhere along the line, Photos changed for the worse. One new problem I encountered this morning is that small images (I saved an ad image for reference from my iPhone) are now ballooned up to fit the screen (on my iMac - looks fine on the phone), creating a grainy image. It used to be that the sizing slider bar in the upper left could be used to reduce the physical size but that not longer works; the photo remains big and grainy no matter what I do with that sliding bar.
I checked preferences ... I saw nothing to indicate a selection that creates this problem.
How do I get Photos to work as it used to, making small, low res photos small physically in the display (but no longer grainy)?
iMac 21.5″, macOS 10.13