Hi-Touch Imaging Technologies PHOTOSHUTTLE 640PS - Manual (Page 56)

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You may decide to use which method to convert you color graphic file into a
black and white watermark file.
1. Threshold Method (Threshold): The threshold method will convert the
image to a black and white graphic file with large contrast.
2. Edge Detection Method (Edge Detect): The edge detection method will
enhance the image edging effect when converting it into a black and white
graphic file.
3. Scale (Scale): Adjust the size of the image.
4. Rotate (Rotate): Adjust the angle of the image.