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Wed, Apr 21, 2021 6:04 PM

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Lightroom Classic: Zoom Function Issues

Is anyone else having the same problem as me with the zoom function in Lightroom Classic? It's been playing up since I changed to v10.

I use the keyboard shortcuts to zoom in on a photo in loupe or develop mode (cmd + =). Instead of zooming in on the centre of the image, it zooms somewhere into the lower middle of the image. When I zoom in further, it shifts across somewhere leftwards. In other words, what used to be a smooth zoom in now veers around in what seems like an unpredictable way.

When I hit F for fullscreen, instead of automatically zooming to fill the screen, as it used to do, the image stays the same size on screen. 

Back in loupe or develop mode, when I hit tab to bring up the side panels, instead of automatically adjusting the zoom level so that the image fills the space between the panels, the image jumps to the side, leaving the left-hand edge aligned with the left-hand side panel, and the right-hand edge disappearing under the right-hand panel.

There are some other irregularities which spring up from time to time.

All in all it's very disturbing and massively disrupts my workflow. I've checked around for any settings I might have accidentally changed, and I don't see anything obvious.

I look forward to resolving this! Thanks in advance.

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7 m ago

"Maybe there's a keyboard shortcut to jump straight to "fit" zoom level?"

Both the space key and Z toggle between FIT and the last selected zoom level.  This is sort-of documented in the Help (which is no longer kept up-to-date):

https://helpx.adobe.com/lightroom-classic/help/keyboard-shortcuts.html 

Even the most authoritative list of shortcuts at https://www.lightroomqueen.com/keyboard-shortcuts/ doesn't list space.

There is a subtle difference between space and Z: In Grid view, typing Z will toggle back and forth between Loupe view, but typing space will take you into Loupe and thereafter toggle between FIT and the most recent zoom level.

Champion

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Poking around some more, the Return key cycles between Grid view, Loupe FIT, and Loop Zoom (whichever zoom level you had last selected).

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7 m ago

On Windows, I can make this happen:

  • start from Library
  • select an image with the mouse 
  • switch to Develop 
  • crop the image significantly, say by 2-4x but NOT on the center of the image; offset to one side or another
  • zoom to 200% or more but not with a shortcut key 
  • select another image 
  • now, frequently but not always, the image is offset

I can't say when this started but certainly several versions ago. Never found it to meaningfully interfere with my editing, just one of those imperfections that we live with no matter the product: house, car, camera... Such is life. 

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Thanks for engaging with this Bill!

Adobe Administrator

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7 m ago

Check this Zoom setting 

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Thanks Rikk. It even works (just padding out the 20 character minimum response.) 

  

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Hey Rikk

Thanks for this. It's solved this part of my issue:

I use the keyboard shortcuts to zoom in on a photo in loupe or develop mode (cmd + =). Instead of zooming in on the centre of the image, it zooms somewhere into the lower middle of the image. When I zoom in further, it shifts across somewhere leftwards. In other words, what used to be a smooth zoom in now veers around in what seems like an unpredictable way.

...which is great! (And by the way, I didn't knowingly uncheck this setting at any point, so maybe it got changed by default in one of the updates.)

However the remaining issues are still present, which are:

When I hit F for fullscreen, instead of automatically zooming to fill the screen, as it used to do, the image stays the same size on screen. 

Back in loupe or develop mode, when I hit tab to bring up the side panels, instead of automatically adjusting the zoom level so that the image fills the space between the panels, the image jumps to the side, leaving the left-hand edge aligned with the left-hand side panel, and the right-hand edge disappearing under the right-hand panel.

However now I see there's a bit more to this. So long as "fit" is selected as the zoom level (in the Navigator part of the left-hand panel), these behaviours happen as expected, i.e. automatic resizing of the image to fill the available space, whether on opening/closing the side panels, or on switching to fullscreen viewing (keyboard shortcut F).

But: Let's say I zoom in once on an image (cmd + =), and then out again, (cmd + -). Instead of coming back to "fit", the zoom setting in the Navigator section has now changed to a fixed number (e.g. 25%). From here, opening and closing panels, or switching to fullscreen view, leaves the photo size unchanged (which is logical, it stays at 25%).

However, I'm pretty convinced that in the past, on some older version of LR, what happened after I zoomed into an image one step, and then back out one step, was that the zoom setting clicked back to "fit". Since it doesn't do this any more, I have to manually click the "fit" setting  each time I finish zooming around. This is where my workflow gets held up. Frankly I preferred it the old way!

With me so far? I hope I've explained it clearly enough. Anyone else experiencing this?

Maybe there's a keyboard shortcut to jump straight to "fit" zoom level? I can't seem to see one.

Thanks all!

(edited)

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7 m ago

Being a nerd, I reverse-engineered LR 10.2's rules for how it positions the image when you change the zoom level. They have a reasonable logic to them, though I'm not at all arguing they're the best possible rules.

 

For each image in Library Loupe, LR remembers the relative position in the image that should be displayed centered in the Loupe window.  That position is measured as percentage from the left and percentage from the bottom, e.g. [25%, 35%] is 25% from the left and 35% from the bottom.  Call this point the "centered point".

 

When you change the zoom level, LR positions the photo as follows: If the width of the zoomed image fits within Loupe, then it will position the image horizontally to show the entire width. Otherwise, it will position the image horizontally such that the centered point's x coordinate is centered horizontally within the Loupe window.   Similarly, if the height of the zoomed image fits within Loupe, then it will position the image vertically to show the entire height. Otherwise, it will position the image vertically such that the centered point's y coordinate is centered vertically within the Loupe window.    These rules account for why the image seems to jump as you zoom in and out.

 

Panning an image and clicking to zoom both change the current centered point. But changing the zoom level via the Navigator panel or keyboard shortcut doesn't change the centered point.

 

When you move to a new image in Loupe, if there is a previously remembered centered point, LR will use that. But if there isn't a previously remembered point for that image, it will use the centered point of the last image viewed in Loupe.  These seem to be remembered across restarts of LR, but I haven't figure out if it remembers the last n centered points or the centered points for all images for all time.

 

When you click to zoom, how LR chooses the new centered point is controlled by Preferences > Interface > Zoom Clicked Point To Center. When that option is set, the clicked point moves to the center of Loupe and becomes the new centered point. When that option isn't set, LR zooms but maintains the clicked point in the image precisely where it was, keeping it under the mouse cursor. The new centered point is set to image location now at the Loupe center.

 

Phew...

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Thanks John. Impressive unpacking! And it does indeed match the situation I was experiencing.

As you'll see above, Rikk has helped me solved this part of my issue. However other parts remain...

Champion

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7 m ago

Note that Zoom Clicked Point To Center makes it less likely that the image in Loupe will jump around, but it's still possible, depending on where the centered point is, the zoom level you're going to, and the relative size of the image and the Loupe window.

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7 m ago

"in the past, on some older version of LR, what happened after I zoomed into an image one step, and then back out one step, was that the zoom setting clicked back to "fit"."

Prior to LR 10, the Navigator panel would show FIT, FILL, 1:1, and whatever additional zoom level you had last selected (e.g. 4:1).   The Zoom In and Zoom Out commands would move among those four. So if you typed Cmd - up to three times, you'd be back at FIT.

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7 m ago

Andrew, reviewing this thread, I think there are now explanations for all the behaviors that were tripping you up and that you have acceptable alternatives for an efficient workflow?   If that's not the case, please restate as crisply as you can what you would like to see changed?  

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Thanks so much for solving this for me John! I'm really grateful for your time and expertise. You've restored my LR workflow to its previous ease, and in fact added some new options for moving between views and zoom levels that I didn't have before, which must be a good thing! 

Wishing you well!