Chapter 7 ISIS/TWAIN Driver Settings
☞When [Deskew] is enabled on the [Basic] tab sheet, the specified area may be displaced when scanning.
Area Window
The size indicated for the Area window corresponds to the page size setting, and the area within the panel indicates the current scanning area.
☞The scanning area can be adjusted by dragging the handles 
bordering the Area window with your mouse.
☞With CapturePerfect, the last scanned image appears in the Area window.
Margin
This control adjusts the top, bottom, left and right margins around the scanning area so that you can expand the scanning area to include the edges of a document, or reduce it to avoid black frames around scanned images.
☞If the edges of documents are missing from scanned images, move the slider to the right to expand the scanning area.
☞To eliminate the black frame around scanned images, reduce the scanning area by moving the slider to the left.
☞The measurement units for margins are determined by the [Unit] setting. However, changing the margin [Unit] setting is not possible on the extended version of the [Basic] tab sheet
Preview Button (TWAIN driver only)
Click the [Preview] button to scan one document page and display its preview image in the Area window.
[Brightness] Tab Sheet
On the [Brightness] tab sheet, you can adjust brightness and contrast for scanning, and access gamma settings. The availability of brightness and contrast settings depends on the mode setting on the [Basic] tab sheet, and if [Custom] gamma setting is enabled, all settings on this tab are disabled and cannot be changed.