When I receive heroes, I can say, whether they have turns or not, looking on indicators in upper left corners. But it is heroes only. My peasants, pioneers, etc. haven't such luxury, so I cannot select it and check, whether they moved or not. All such strategy games usually have buttons for scroll available units, but Elemental is not. Maybe it worth to enter it?
I am sorry, if this button exist somewhere, and I am simply didn't found it.