The stack display is in the upper right hand corner of the screen. It shows a stack of kirigami figures, which is several figures (each colored) laid on top of each other. The individual figures are opaque, so that the figures on top obscure the figures beneath - you only see the lower figures through the holes in the upper figures.

When the program begins there is a single figure in the stack. Below the display stack is the display stack control bar, which is a set of small buttons:

• The + button will add a new figure to the stack. The new figure is added on top, so it completely obscures all the other figures.
• The - button deletes the current figure.
• The > and < buttons move the current figure up and down in the stack.
• The numbered buttons let you choose one of the figures in the stack to be the current figure. The current figure is the one that is being edited. Note that there is a small red line underlining the current figure.