Reversing the cards

Help request, or suggestion:
It seemed to me a fairly basic option,
but having looked through all instructions I have not found any way to reverse cards, singly or the whole deck
(both ways would be useful).
So for example for a language card, to have, say, the French word shown upfront instead of the English word.
Using primarily the Ankidroid app
I do not make my own cards, using the choice of decks shown.
Thank you!