Fast Overview; Overview Automatically When Scanwizard Pro Is Started; Keep Overview Image; Show Confirmation Message Box If There Is Any Prescan Image - Microtek ScanMaker 6400XL Reference Manual

Fast Overview

The Fast option supports faster scanning with the sacrifice of overview image
quality; on the contrary, if Fast Overview is unchecked, Overview scanning
speed is slow, but it obtains better overview image quality.

Overview automatically when ScanWizard Pro is started

If this option is checked, when ScanWizard Pro is launched, your scanner
automatically performs prescan, and shows the prescanned image in the preview
window. If unchecked, auto-preview is disabled, you should click the Overview
button to execute prescan.

Keep Overview image

If unchecked, the preview image will be cleared when you exit from ScanWizard
Pro and re-launch ScanWizard pro. If checked, the preview image stays on the
screen unless subsequent overview or prescan is performed.

Show confirmation message box if there is any prescan image

If this option is checked, a confirmation message appears, notifying you in the
preview window, a previously prescanned image exists. If unchecked, there is no
warning message in this occasion.

Preview

Click this button to get a scanning preview.
Reference: The Preview Window 27