When you build a product with Components, Texts or Logos, each of these components, or layers, are stacked on top of each other like sheets of acetate.
You can edit the position of a layer by clicking on the Reorder Layers icon (top left of the screen).
Then you can drag and drop it up or down the list. A layer that is located on of top of your components list will appear on top of your product.
Make sure to position your texts and logos on top our your component list to prevent them from being hidden behind other parts of your product.