There are games having both portrait (vertical) and landscape (horizontal) cards. Seeing the orientation (horizontal/vertical) of the cards held in the hands of other players might thus give away some information, even if only the backside is visible to other players. I suggest to introduce a 4th mode for the hand zones which also hides the rotation state to other players (cards should then be displayed as vertical backside to other players, independent of the actual orientation used by the player holding the cards). This should also apply to the Alt-look mode, i.e., when holding Alt and hovering over the cards inside other players hands they should always be shown vertically, even if the actual card that player is holding is a sideways card.