B/C - Brightness and Contrast Mixer

The Brightness/Contrast Mixer is at the top right, labelled B/C. The horizontal (left and right) axis controls the amount of Brightness and vertical axis (up and down) controls the amount of Contrast.

PC

Mac

If you click, hold and drag the cross-hair’s target around the Brightness/Contrast box, you will see the effect on the appearance of the Palette as shown in the following set of screen-grabs.

PC

Mac

At a read-out of 50,97 the contrast is really dark; at 50,16 the contrast is very light; at 8,79 there is a low-level of contrast and it looks gloomy; and at 95,29 the Palette looks bright and highly contrasted.

If you drag the Brightness setting to 100, i.e. hard left of the B/C Mixer, you will be thresholding the Palette - i.e. the colours are reduced to just black and white. If you then slide the cross-hairs up and down, the area of white will decrease as you slide up, and decrease as you slide down – the opposite is true for the black areas. In this screen-grab the setting has been moved to 100,68.

The B/C Mixer’s threshold function is particularly useful when you want to create a mask, for example to distribute colour in a defined area.

PC

Mac