Sindoh M612 - Manual (Page 79)

2-
9
Copying
2
Adjusting Copy Density
1 Press Copy Density.
2 Select the desired values, and then press OK.
Auto Copy Density
The machine scans density of the original and automatically adjust the density of images.
Heavy textures of the originals(news paper or recycled paper) are copied without copying the background.
1 Press Copy Density.
2 Select On/Off in Auto Density, and then press 【OK】 button.