Canon C3500 - Manual (Page 167)

Chapter 6 Scanning With the MultiPASS C3500 6-9
Scanning
Setting Black and White Options
If you choose black and white as your scan mode, you can also select one
of the following black and white options from the C3500 tab:
Threshold
The Threshold option provides a high contrast evaluation of the image
in terms of blacks and whites only.
Halftone
The Halftone option simulates the tonal range of an image with a
precise pattern of lines and dots.
1. Click the C3500 Tab.
2. In the Black & White Options list, choose Threshold or Halftone.
Adjusting the Preview Image for Final Scan
Once an image has been previewed, you can adjust it, as necessary, for
the final scan by changing its selection size, its output size, and aspects
of its orientation.
Clearing the Preview Area
If the preview image does not serve your purpose, you can quickly
remove it from the preview area and rescan the image.
On the toolbar, click Clear Preview.