Practical use of negation

I used Microsoft FrontPage to compose this lesson.

Figure 1 has a normal image of a starfish at the top and a negated image of the same starfish at the bottom.

If Figure 1 is selected in Frontpage:

• The top image becomes negated.
• The bottom image becomes normal.

De-selecting Figure 1 causes the images to return to the images that you see when you view the lesson.