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<title>2.6. Select By Color Tool</title>
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<th colspan="3" align="center" id="chaptername">2.6. Select By Color Tool</th>
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<div class="sect2" lang="en" xml:lang="en">
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<div>
<div>
<h3 class="title"><a id="gimp-tool-by-color-select"></a>2.6. Select By Color Tool</h3>
</div>
</div>
</div>
<a id="id3321250" class="indexterm"></a>
<div class="informalfigure">
<div class="mediaobject">
<img src="../images/toolbox/toolbox-selbycolor.png" />
<div class="caption">
<p>
Select by Color tool icon in the Toolbox
</p>
</div>
</div>
</div>
<p>
The Select by Color tool is designed to select areas of an image
based on color similarity. It works a lot like the Fuzzy Select
tool ("Magic Wand"). The main difference between them is that the
Magic Wand selects <span class="emphasis"><em>contiguous</em></span> regions, with
all parts connected to the starting point by paths containing no
large gaps; while the Select by Color tool selects all pixels that
are sufficiently similar in color to the pixel you click on,
regardless of where they are located. Also, clicking and dragging
in the image has no effect on the Select by Color tool.
</p>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3321542"></a>How to Activate</h4>
</div>
</div>
</div>
<p>
The Magic Wand Tool can be activated from an image
menu as
<span class="guimenu">Tools</span>-><span class="guisubmenu">Selection Tools</span>-><span class="guimenuitem">Select by Color</span>;
from the Toolbox by clicking on the tool icon
<span class="guiicon">
<span class="inlinemediaobject"><img src="../images/toolbox/selbycolor.png" /></span>
</span>;
or from the keyboard using the shortcut <span><b class="keycap">O</b></span> (note
that this is a capitalized letter O, not the number 0).
</p>
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<div class="simplesect" lang="en" xml:lang="en">
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<div>
<h4 class="title"><a id="id3321424"></a>Key modifiers (Defaults)</h4>
</div>
</div>
</div>
<p>
The select by color tool does not have any special key modifiers,
only the ones that affect all selection tools in the same way.
See <a href="ch03s02.html#gimp-tool-select" title="2.1. Common Features">Selection Tools</a> for
help with these.
</p>
</div>
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<h4 class="title"><a id="id3321606"></a>Options</h4>
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</div>
</div>
<div class="informalfigure">
<div class="mediaobject">
<img src="../images/toolbox/tool-options-selbycolor.png" />
<div class="caption">
<p>
Tool Options for the Select by Color tool
</p>
</div>
</div>
</div>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note">
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<img alt="[Note]" src="../images/note.png" />
</td>
<th align="left">Note</th>
</tr>
<tr>
<td colspan="2" align="left" valign="top">
<p>
See <a href="ch03s02.html#gimp-tool-select" title="2.1. Common Features">Selection Tools</a> for
help with options that are common to all these tools. Only
options that are specific to the Select by Color tool are
explained here. Note that they are the same options as the
Magic Wand tool has.
</p>
</td>
</tr>
</table>
</div>
<div class="variablelist">
<dl>
<dt>
<span class="term">Finding Similar Colors</span>
</dt>
<dd>
<p>
These options affect the way the Magic Wand expands the
selection out from the initial point.
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p><b>Select Transparent Areas. </b>
This option gives the Magic Wand the ability to select
areas that are completely transparent. If this option
is not checked, transparent areas will never be
included in the selection.
</p>
</li>
<li>
<p><b>Sample Merged. </b>
This option becomes relevant when you have several
layers in your image, and the active layer is either
semi-transparent or is set to another Layer Mode than
Normal. If this is the case, the colors present in the
layer will be different from the colors in the
composite image. If the "Sample Merged" option is
unchecked, the wand will only react to the color in
the active layer when it creates a selection. If it is
checked it will react to the composite color of all
visible layers. For further information, see the
glossary entry <a href="go01.html#glossary-samplemerge">Sample Merged</a>.
</p>
</li>
<li>
<p><b>Threshold. </b>
This slider determines the range of colors that will
be selected: the higher the threshold, the larger the
resulting selection.
</p>
</li>
</ul>
</div>
</dd>
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