The Two-Choice Matrix Display dropdown option is available when using the 
Single Range, Radio Buttons (choose Only 1) Question type. You can choose from the two types of display options:
    
        - Use Standard Matrix Display Options
- Display Question using a Swipe Card Stack
Choosing the 
Display Question using a Swipe Card Stack option will display the 
Matrix question type as an interactive 
Swipe Card Stack. A number of social apps use the "Swipe" metaphor for selecting items and this is another gamification option for your surveys.
    You can only use a Swipe Card Stack when you have 
EXACTLY two (2) choices in your 
Matrix Selection Choices. These two choices represent swiping the Card Stack 
left or 
right.
    
    You can use the following steps to create your own Swipe Card Stack question:
    
      It is important to note that images being used in Question Rows may need to be modified with image editing software to correctly fit the circular Card Stack image frame. For example, adjusting the image width and height, or cropping the image to create better alignment and focus.