Working With Layers
This page demonstrates the layering of images in a page using transparent images. The red arrow below has a transparent background so you can drag it over the other images and not see a square patch of white around it.
This allows you to put multiple images together to make up one picture in a page.
Try dragging the arrow over the other images.
Below we have a cartoon scene with 2 emoticons. Try dragging each of the emoticons over the cartoon stage. You will see the emoticons have a transparency and do not cover up the cartoon stage. This can be done with any image by removing the background and saving it with a transparency as a PNG file.