Microtek ScanWizard EZ Reference Manual page 66

Fast Overview
The Fast Overview option supports faster scanning. If Fast Overview is
unchecked, the Overview scanning speed is slow , but a better overview image
quality is obtained.
Overview Area
Choose Maximum Size, other fixed dimensions, or choose Custom Size, then
enter the required dimensions. You may also set the Overview Area by dragging
the dotted borders.
Unit
This lets you set the units for the r u ler, such as inch, cm, and mm.
Preview button
Click this button to get a scanning pr e view, or to do a new over v iew. This is
helpful if you have specified custom settings or changed the dimensions.
26 Microtek ScanWizard EZ - Professional Mode Reference Manual