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<th colspan="3" align="center" id="chaptername">5.4. Brightness-Contrast tool</th>
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<h3 class="title"><a id="gimp-tool-brightness-contrast"></a>5.4. Brightness-Contrast tool</h3>
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<p>
The Brightness-Contrast tool adjusts the brightness and contrast levels
for the active layer or selection. Levels and Curve tools are more
efficient.
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<h4 class="title"><a id="id3329532"></a>Activate Tool</h4>
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The Brightness-Contrast Tool can be called from the image-menu:
<span class="guimenuitem"><span class="accel">T</span>ools</span>/
<span class="guimenuitem"><span class="accel">C</span>olor
Tools</span>/<span class="guimenuitem">B<span class="accel">r</span>ightness-Contrast
.</span>
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<h4 class="title"><a id="id3329951"></a>Options</h4>
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<span class="term">Brightness</span>
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This slider sets a negative (to darken) or positive (to brighten) value for the brightness,
decreasing or increasing bright tones.
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</dd>
<dt>
<span class="term">Contrast</span>
</dt>
<dd>
<p>
This slider sets a negative (to decrease) or positive (to
increase) value for the contrast.
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</dd>
<dt>
<span class="term">Preview</span>
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<dd>
<p>
The Preview checkbox makes all changes to the brightness and
contrast dynamically so that the new level settings can be viewed
immediately.
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