Canon imagePROGRAF GP-4000 - Manual (Page 517)

You can also directly enter a value linked to the slider. Enter a value in the range from -50 to 50. The
current settings are displayed in the settings preview on the left side of the printer driver.
After adjusting each color, click OK .
5. Complete the setup 5.
Click OK on the Main tab.
When you execute print, the image is printed with the adjusted contrast.
Related Topics
Setting the Print Quality Level (Custom)
Specifying Color Correction
Adjusting Color Balance
Adjusting Brightness
517