As we can see, this mode is similar to the three modes before it. It also lightens the colors on the adjusted layer and only affects the regions where there is a color on the lower layer. Because the Paper color is white, wherever the vertical stripes overlap the Paper color, they turn white as well, making them disappear.
The blue vertical strip has turned almost white over the yellow horizontal stripe, but it has become light blue over the purple stripe. The red vertical stripe has changed to a brighter yellow color where it overlaps the yellow stripe, but is now a hot pink color over the purple stripe. In this mode, the colors below the adjusted layer are added to the colors above and are then brightened.
This mode also has an Add (Glow) mode, which interacts in the same way but produces a stronger effect on semi-transparent areas of the layer.