Sharp AR-C160 - Manual (Page 8)

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4. Suppress background (See page 3-20.)
This copier can suppress unnecessary background colors on the original image when copying. This function is used
to adjust the density level of background colors to be erased.
Original Copy
3. Sharpness (See page 3-18.)
This function is used to sharpen or soften image outlines.
Original Softer Sharper