•To resize the scan area, place your cursor over the edge or corner of the marquee, then click and drag the edge where you want it.
Note: Manually adjusting the marquee will not change the target size of the scanned file. The marquee only indicates the area of the image that will be scanned.
4.To create a scanned image size that is not available in the Target Size list, click the Customize option.
You see this window:
5.Name the custom size, enter the size, click Save, and click OK. Then adjust the marquee on the preview image.
The marquee is automatically proportioned for your custom scan size.