Ricoh IS100 Quick Manual page 76

ADJUSTING DENSITY
IMAGE SCANNER IS100e is preset to the Normal level of density. If
your original document comes with a lighter or darker contrast, you can
improve the quality using the Adjusting Density feature.
To change your density,
1. Press the "Copy" key on the panel to prompt the Copy screen.
2. Press the "down" key to move your cursor down to the Density
field.
3. Choose your desired density with the "left" key or the "right" key.
Operation
6-12