Asus Xonar HDAV1.3 - Manual (Page 63)

57 ASUS Xonar HDAV .3
To add customized settings, select CustomA / CustomB then click the Custom
button.
From the customize settings screen, adjust the brightness, saturation, hue,
contrast, and sharpness according to your desired settings and name your
customized setting. Click
OK when done.
You can customize two more settings based on your needs.