Epson Macintosh - Manual (Page 67)

Icon Glossary
This glossary describes the TWAIN icons. If you want to know
what a specific icon does, locate the icon in this glossary; then
read its description. Some icons open dialog boxes that contain
more icons. Icons in the dialog box are described after the
initial icon. See Chapters 3 and 4 for instructions on using the
icons.
Preview. Allows you to see your entire image before
scanning it. Once an image is in the preview window, you
can check its width, height, and file size on the screen.
Previewing also allows you to see the effects of changes
you make to your image.
Zoom Preview. Allows you to select a specific area of an
image in the preview window and preview it again so that
only the selected portion of the image is shown. Use the
mouse to select the part of the image you want to preview.
Invert. Allows you to change negative images into positive
images, or positive images into negative images.
Auto Exposure. When you click this icon, the Highlight and
Shadow settings in the Image Controls dialog box are
automatically set. When you select Scan from the easy
screen, TWAIN uses these settings.
Icon Glossary 1