Yes. Cmd / (forward slash) toggles it on and off.
Thank you for your reply! The bar on the bottom thats shows how many items in the folder and GB available is now visible.
The Toggle button for the thumbnail size is still not showing... ? I'm on Yosemite, not sure if this option changed or not?
opps ok.. got it.... I was in list mode... Now in thumbnail mode. toggle is showing..
Glad you got it going. I'm in Thumbnail mode most of the time in my Finder, so I didn't notice that the slider isn't there in others. I'm running Yosemite as well and I'm happy this feature has been kept.
Thanks for letting me know