You can also use the Fast Color Corrector effect to adjust contrast and tone in Adobe Premiere Pro.
- Auto Black Level: One click of this button raises the black levels in a clip so the darkest levels are above 7.5 IRE (NTSC) or 0.3v (PAL), which means they are broadcast safe. The shadows of the clip are slightly brightened when you use the Auto Black Level button.
- Auto White Level: One click of this button lowers the white levels in a clip so the lightest levels do not exceed 100 IRE (NTSC) or 1.0v (PAL), which means they are broadcast safe. The effect also clips a portion of the highlights, and the rest of the pixel values are redistributed proportionately. The Auto White Level option tends to darken the highlights in an image.
- Auto Contrast: This button applies both the Auto Black Level and Auto White Level commands simultaneously. The Auto Contrast option makes highlights appear darker and shadows appear lighter.