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                <h1>
                    Specify a tonal range for blending layers
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                <div><div class="section"><p>The sliders in the Blending Options dialog
box control which pixels from the active layer and the underlying
visible layers appear in the final image. For example, you can drop
dark pixels out of the active layer or force bright pixels from
the underlying layers to show through. You can also define a range
of partially blended pixels to produce a smooth transition between
blended and unblended areas. </p>
</div>
<ol><li class="stepexpand"><span>Double-click a
layer thumbnail, choose Layer&#160;&gt; Layer Style&#160;&gt;
Blending Options, or choose Add A Layer Style&#160;&gt; Blending
Options from the Layers panel menu. </span> <div class="note"><span class="notetitle">Note:  </span>To view blending options for a text layer,
choose Layer&#160;&gt; Layer Style&#160;&gt; Blending Options,
or choose Blending Options from the Add A Layer&#160;Style button
at the bottom of the Layers panel&#160;menu.</div>
</li>
<li class="stepexpand"><span>In the Advanced Blending area of the Layer Style dialog
box, choose an option from the Blend If pop‑up menu. </span><ul><li><p>Choose Gray to specify a blending range
for all channels. </p>
</li>
<li><p>Select an individual color channel (for example,
red, green, or blue in an RGB image) to specify blending in that
channel.</p>
</li>
</ul>
</li>
<li class="stepexpand"><span>Use the This Layer and Underlying Layer sliders to set
the brightness range of the blended pixels—measured on a scale from
0 (black) to 255 (white). Drag the white slider to set the high
value of the range. Drag the black slider to set the low value of
the range.</span> <div class="tip"><img src="images/tip_help.png" />To define a range of partially blended
pixels, hold down Alt (Windows) or Option (Mac&#160;OS), and
drag one half of a slider triangle. The&#160;two values that
appear above the divided slider indicate the partial blending range.</div><p>Keep
the following guidelines in mind when specifying blending ranges:</p>
<ul><li><p>Use the This Layer sliders to specify the
range of&#160;pixels on the active layer that will blend, and&#160;therefore
appear, in the final image. For&#160;example, if&#160;you
drag the white slider to 235, pixels with brightness values higher
than 235 will remain unblended and will be excluded from the final
image. </p>
</li>
<li><p>Use the Underlying Layer sliders to specify the
range of pixels in the underlying visible layers that will blend
in the final image. Blended pixels are combined with pixels in the
active layer to produce composite pixels, whereas unblended pixels
show through overlying areas of the active layer. For&#160;example,
if you drag the black slider to 19, pixels with brightness values lower
than 19 will remain unblended and will show through the active layer
in the final image.</p>
</li>
</ul>
</li>
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