Push Box SHAPE in the back so that it doesn't overlap my image

If at the very start of creating a project I place a "Box" shape and give it a color, and afterwards place an image everything works fine and I can see the image.

However, if I first place images and then place a "Box" shape with a certain color, then I won't be able to see the image anymore.

How to push either the "Box" shape to the back or push the image to the front?