27" 4K monitor @3840x2160 resolution.
Image displayed is 4128x2322 pixels.
Studio leaves a lot of empty (useless) “canvas” space around the displayed image.
Trying to fit to the larger available space using the “Fit” button to zoom it, and it locks as the same. Small(ish) image in the middle with lots of wasted space in the editing area.
The Fit algo seems to think that this image/size, when “fitted”, should be displayed at 57.6% (as shown in title bar) .
If I manually use the Zoom controls to actually fit the image to the available editing space (maximize editing space, while seeing the entire image), an actual “fit” arrive at around 83.2%, displaying the image much larger, obviously.
Of course, these percentages depend on image size and monitor size. But it seems that the “Fit” algorithm isn’t quite capable of figuring out how to “fit” an image to available space.