![](http://pdfasset.owneriq.net/e/cd/ecd4e25b-6c7f-4b3a-beb8-2b3b976f98d6/ecd4e25b-6c7f-4b3a-beb8-2b3b976f98d6-bgbf.png)
6-6 M3099GX/GH OEM Manual
As Figure 6.4 shows, the top 3-mm part of the read area on each
surface should be left blank (grounding color) by specifying a drop-
out color. If the drop-out color cannot be specified, select “Photo”
for the document type (line drawing or photograph).
For details of the drop-out color, see next Section.
Grounding Color
Area
Figure 6.4 Grounding color area
Main scanning direction
Reading
reference
Grounding color
(white) or drop-out
color area
3
Subscanning direction
#06 Chapter 6 98.2.22, 1:51 PM6