→ 
→
(4) Contrast inversion
The Negative 
button inverse black and white.
(5) Gamma correction
A Gamma value of larger than 1 enhances dark area and suppresses highlight area. A value smaller than 1 suppresses dark area and enhances highlight area.
Select a gamma value and click the button.
(6) Apply or cancel conversion result
OK button applies conversion result and rewrite image palette data. Cancel button cancels conversion result and return to original contrast.
Close button closes the dialog window. If it is before clicking OK, the conversion result is canceled.
(7) Pseudo color conversion
Pseudo color 
button expands the dialog window for pseudo color setting.
Set following parameters.
