Shape is any type of form used in a display, remembering that the display case or bulletin board itself is a shape. The main problem is to arrange all of the different sizes and shaped items into larger and more important shapes, and then to relate them to the rest of the design. Use as few shapes as possible and don't use 2 or 3 shapes where 1 large one will do. Do not mix shapes too much. Try to limit the number of different shapes and sizes used.
Texture is the visual or tactile appearance of a surface.
Surfaces can look or feel smooth, rough, soft, cool, or warm. They can look pleasant or unpleasant, which can have a dramatic effect on a display. Matt and shiny finishes also add texture. Space adds interest, excitement, and contrast to your design. Any shape that overlaps another seems to be in front of it and warm colors seem to be in front of cool ones.