Format the Pictures
Some of
the pictures from space have a black background. However, the
density of the black is not as dark as the black color of the
slides. There is a simple way to make adjustments.
Try it: Adjust the Contrast
Click once
on the picture to select it.
Go to the Format tab
Adjust
the Contrast
Brightness
bathes the image in light and “washes out” the
colors.
Contrast accentuates the difference between absolute black and
white. When you increase the Contrast, the black gets darker and the
white gets lighter. When you decrease the Contrast, the picture
fades to grey.