Since I've never come across this - can anyone explain this feature ? or is there a wiki page explaining this in more detail ?
From what I see when trying around with this, this only works in the column browser and only for Artist metadata (I assume a historical convenience function for unifying mixed Artist spellings/variants easily...?) or is this functionality adjustable to other/more metadata ?
Cheers.
c.
I was in the same boat; I never knew the existence of this feature prior to this thread. Basically, if you drag files to a column, the respective field of those files will be updated to whatever value you dropped them in. For example, say you want to have a group a files to have the same year (say, 1999). Instead of selecting them and pressing shift+enter to open up the tag editor (like I would), you drag those files to the Year column, drop them on "1999" and press okay. Now, the value of <Year> in all of those files will be "1999".
Conversely, if you were dragging and dropping files to fill a custom playlist on the left sidebar and accidentally released the mouse button while hovering over one of the column fields (and absentmindedly pressed enter to confirm), you'll be left with a pile of files with the same value as whatever column you dropped them in. Then again, there's an undo command. But it can get annoying if one is creating a bunch of custom playlists after opening MB for the first time.