Smart previews have fewer pixels than your original RAW photo, and therefore fewer pixels than the regular previews.
So, smart previews will not fill the 5K screen at 1:1, it doesn't have enough pixels, and 1:1 does not allow Lightroom to make up extra pixels. Fact of life, I don't think there's anything you can do about this.
This is partly the case:
While it is true that smart previews have a portion of the pixel count (2560) from the original RAW file, there is a difference between how Grid Mode (Loop) interprets the smart preview vs how the Develop Mode interprets the smart preview. It already makes sense to me that 1:1 previews do not fill the screen based upon how the Retina display works. What is confusing to me is how/why "Fit" screen (found within the navigator) when in develop does not present a fitted image. As I said above, selecting 2:1 is viewable without noticeable pixelation but is too large for the screen.
Again, this is an issue how how LR interprets the smart preview differently between Grid Mode and Develop Mode.
I believe Fit will only make images smaller to Fit the available space, I don't think Fit makes images larger.
That may be true re Fit image.
But, after more tinkering, I've found that when summoning the crop tool, the smart preview fills the screen completely with crop handles on all 4 corners. So again, there is something going on with regard to how LR is interpreting smart previews in develop vs crop AND within grid mode.
hoping Adobe would answer this question. I know exactlly what your talking about working with smart previews being to small on screen while editing then when you use the crop tool the image fills the screen and looks fine for editing but onnce you exit the crop tool the image goes back to a small view. We Want Smart Preivews lookign like we have the crop tool on with Out The Crop Tool Being On. Not Rocket Sience :-) Please FIX!!! :-)
hoping Adobe would answer this question.
In general, this is a user-to-user forum, and "Adobe" doesn't answer questions of this nature.
There is a link on the front page of this forum for bug reports and feature requests.
Tool Being On. Not Rocket Sience :-) Please FIX!!! :-)
There is nothing for Adobe to FIX. Smart Previews have a smaller number of pixels for several reasons and is as designed. There is NO reason to make the Smart Preview larger. If you want more pixels use the full size RAW.
Thanks for you input but respectfully you apparently have no idea what I'm talking about. My post is clear in what I and others are frustrated by.
David Butler II
<Edited by Mod>
And Library uses 1:1 previews which you generated - that's why Fit works fine there.
While Develop uses Smart Preview and it just doesn't have enough pixels to fit the screen.
In short - you are frustrated by the fact that Fit view doesn't enlarge image to fit the screen, only downsizing it.
This is by design and there is no reason for different behavior.
I know exactly what you are talking about as I also have an iMac Retina 5K screen and have seen this. I also understand what the Smart Previews are used for so don't view it as something Adobe needs to address in a FIX. You really can't do an adequate job of sharpening and noise reduction using smart previews. I always use full size RAW in Develop. You can post a feature request here. Photoshop Family Customer Community
Agreeing with Bob Somrak. This is the way it was designed, and so there is really nothing to "fix".
You can, however, request a new feature, although what you are requesting seems to totally defeat the purpose of Smart Previews.