Zoom Into Column View Preview Panels in Finder of Mac OS X
This is a handy Finder tip for those who like to use the Column View of the OS X file manager: you can zoom into the Mac OS X Finder Column View Preview panes. Here’s how this works using either a key modifier or multitouch trackpad:
• Zoom into Preview panel by option clicking on the preview. You then can use either a trackpad or scroll wheel to zoom in or move around on the image.
OR you can use the multi-touch trackpad entirely:
• Hover the mouse cursor over the Preview panel of OS X Finder windows and make a spreading or pinching motion with the multitouch trackpad, just like zooming in or out in iOS.
Both of these will zoom in or zoom out of the picture panel preview on the Mac Column view. By the way, this works quite well if you have set your default column view for the Preview panel to be large, particularly for browsing through many photos in a directory structure.
This works in all versions of OS X too, as you probably guessed.