GAMMA adjustment (GM parameter)

You can adjust the gamma value. The default is 0. Pressing B on the control button of the printer increases the halftone of each of the RGB data in the direction that the brightness increases.

Pressing b on the control button decreases the halftone of each of the RGB data in the direction that the darkness increases.

SHARPNESS

SHARPNESS adjustment is a function for adding emphasis to edges in pictures. This function cannot be used to increase the resolution. It is intended for changing the sharpness.

SHARPNESS can be used as a parameter to improve pictures, but increasing the sharpness too much will not produce a natural picture. Generally, the default setting is recommended. When a large print size is used and SHARPNESS is set to a large value, picture quality does appear to improve.

Contrast

In addition to the sharpness function, it is possible to add sharpness to the image by adding the contrast of dark and light. Contrast can be set using the DARK and LIGHT items in the menu screen. Increasing the DARK and LIGHT values in the plus direction increases the contrast, and a high contrast image can be obtained. The downside, however, is that increasing the contrast values in the plus direction diminishes the amount of information about white and black tones, and as a result, the white and black gradation becomes coarser. Thus, an appropriate contrast setting is required. We recommend setting the contrast to +2 or +3.

Using Guide Print to Check the Adjustment Results

You can print a guide picture to check the adjustment results.

1

5

 

3,6

2,4

 

 

 

 

 

1

Set the mode dial to .

2

Press the b or B control button and select the guide

 

picture to print.

 

3

Press the /

 

 

button.

 

 

 

 

 

 

 

 

 

 

 

The layout preview screen appears.

4 Select Guide Print-RGB or Guide Print-DLGm using the b or B control button.

5 Select whether to print in color or black & white by pressing the V control button.

6 Press the / button again. The guide picture is printed.

Check the printed picture and readjust the picture quality if necessary.

For details on how to make adjustments using the printed guide picture, see “Guide Print Function” on page 60.

Note

The guide picture printout cannot be used to check sharpness.

Adjusting the Printer Picture Quality

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