UMAX Technologies Astra 3400 - Manual (Page 29)

Moving the slider on the scroll bar to the right increases the brightness of the mid-range gray tones.
Moving it to the left decreases the brightness of the mid-range gray tones. The default setting is 1.2.
Reset Button
Click the Reset button to cancel the changes and return the value to the default setting.
Adjusting the Image Tones
The Curve command is another way to make precise adjustments in the highlight, midtones, or shadow
levels in your images. Using this feature corrects the gray/color values in an image. You change the values
by altering the shape of the curve that represents the brightness values of pixels.
Click Reset to cancel the changes and return the value to the default setting.
Adjusting the Color Balance
The Color Adjustment feature controls the hue and saturation of a particular color.
When you click on the Color Balance tab from the Color Adjustments panel, a continuous color spectrum
wheel appears.
When you click in the wheel the image tones are shifted to the particular hue that is represented in that area.
Click the Reset button to cancel the changes and return the value to default setting.
Rotating/Inverting an Image
You can rotate an image clockwise or counter clockwise, and you can flip image 180 degrees vertically or
horizontally.
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