Q: Thumbnails in full screen view

It has changed, indeed. Previously, we could show the thumbnails in a sidebar, and now this bar has been moved to a filmstrip below the enlarged photo.

The icon to display the thumbnails in a split view has been changed as well. It now is showing the strip of photos below the enlarged photo.

You're welcome.

In my small MacBook Pro display the sidebar with the larger thumbnails was much more convenient. Now it is hard to see anything at all in the tiny, tiny thumbnails. On the plus side, I can see more of them. And I can scroll quickly through the thumbnails by scrolling/swiping with two fingers on the trackpad.

Just spent (wasted) ages looking for a way to change this back.  Trouble is, these days, with much becoming less intuitive than it ever used to be with Macs, you never know whether it's yet another feature that's been removed with an update or whether you've clicked a buried setting somewhere.  In this case of course it's the former.

I really dislike the horizontal scroll of the thumbnails now.  As Leonie said, at the foot of a MacBook they are too small to be useful.  Why they don't include an option for vertical or horizontal display is beyond me.

there is a light line above the thumbnails - drag it up and down to change the thunbnail sizes

And tell APple what changes you would like to see - http://www.apple.com/feedback/

LN

Yes, my, how could I guess the "tell Apple here" reply was coming.  I've sent feedback already.  It's a pretty obvious thing to do really and I certainly can't be bothered to type on every post "I've sent feedback already".  You obviously missed the opportunity to post it above!!

The option to resize still has the thumbnails displayed in a crunched up row across the bottom.  Far less useful to me than the individual images stacked to the side.  Still.  All part of the drive to turn Mac OS into iOS for Mac. Yet another nail in the coffin for me.  Next time round I'll be looking elsewhere.  I don't need a 17" iPhone.

there is a light line above the thumbnails - drag it up and down to change the thunbnail sizes

Good point, Larry, it helps a bit to increase the size of the pane with the thumbnails, but we can only make them slightly larger. In the sidebar the thumbs had a decent size, so it was possible to compare photos.

Exactly!!!

And all thumbs are shown clipped to portrait format, even the landscape photos. The only thumbnail shown with the correct aspect ratio is the currently selected one.

All photos in the screenshot below are landscape photos, but are displayed clipped as portrait photos with half of the photo missing:

I really like to have a filmstrip below the photos like the split view in Aperture, but it should show the photos in a decent size, and with metadata badge overlays.

I experimented a bit.  The height of the panel with the filmstrip seems to be stored in the com.apple.Photos.plist in ~/Library/Preferences.

There is a variable IPXEditorThumbnailBrowserHeight . Initially this variable seems to be set to 50, and by extending the panel we can increase it to 100, but not beyond.

It is possible to set a new default for this height:

• Quit Photos, if it is running.
• Launch a Terminal and paste
  defaults write com.apple.Photos IPXEditorThumbnailBrowserHeight 100
  into the Terminal.
• Log off and on. Now Photos will always launch with the thumbnail panel at this height. Any default larger than 100 will be ignored.
  
  
  

SOrry to have tried to assist you - have a nece day

and you are so very welcome for my time and assistance

LN