I have updated to 10.x months ago coming from 9.x but only now stumbled above a different behaviour regarding the way the filename is displayed in thumbnail mode.
In the 9.x version I was able to click once on the thumbnail to see its complete filename. The name would just overlap on other files if needed:
Now in 10.x clicking on the the thumbnail doesn't work the same way anymore:
Is there a setting I need to alter to get back to the former way? I find it very ennoying to not be able to quickly see the filename. What I do now, as a workaround, is calling [F2] as if I wanted to rename the filename since then the whole name is made available...