to scan only part of an image into the host application, use the crop tool in the layout tools palette to select the desired area. this selection is referred to as a “crop.”
1 open the layout tools palette click the triangle next to “layout tools” in the tool chest (if the tool chest is not already open, click the tools button in the scan window and select tool palette1 from the menu that appears).

2 select the crop tool

3 select a crop
to select a crop, drag the mouse over theimage in the preview area. the borders of the crop are indicated by a dotted line. the size of the crop can be changed by dragging its borders. to change the position of the crop, place the cursor inside the selected area and drag it to a new location.
repeat this step for the other images selected in the thumbnail drawer. to display images in the preview area, open the thumbnail drawer and click the selected thumbnails.

3 choose centimeters or inches from the output units menu.
4 enter a value for height or width that will fi t on a4 paper (remember to leave a margin of least 2 cm/0.79?). the other value will automatically be adjusted to maintain the current crop; if the result is still too large, enter a value that will fi t on a4 paper.
5 enter an output resolution of 360 pixels per inch.

the easy scanning guide gives examples of how to adjust “crop” palette settings in a variety of situations.