Very good initiative Mezich, in the context, this is clearer.mezich wrote:see it in context
In fact, the "Compare" icon Doesn't need some extra information.
Or maybe only a "~" similar sign, because the first icon is "Open" = View Mode, and the second icon "Compare" is almost like as a "Thumbnails Mode", and the third one is the "Full screen Mode" so it's a little bit confusing, then the "Compare" icon is not at the right place into the toolbar.
But #3 is fine for me too.