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The Color Picker Tool is used to select a color on any image opened on
your screen. By clicking a point on an image, you can change the active
color to that which is located under the pointer. By default, the tool
works on the active layer, but the Sample Merge
option lets you grab the color as it is in the image, resulting of the
combination of all layers.
Only colors in visible layers are used. An
Info window opens when you click on the image.
6.2.1. Activating the Tool
You can get to this tool in several ways :
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In the image menu through
→ ,
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by clicking the tool icon
in Toolbox,
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by pressing the O keyboard shortcut,
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by pressing the Ctrl key while using a paint
tool. The Color-picker dialog is not opened during this operation
and the tool remains unchanged after releasing the key.
Nevertheless, you can get information by using the
Pointer window.
6.2.2. Key modifiers (Defaults)
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Shortcut
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The o key will activate the Color Picker tool.
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Ctrl
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If the pick mode is set to Set foreground
color, then pressing the Ctrl key
switches the tool into the Set background
color mode. If the pick mode is set to Set
background color then the key switches the mode to
Set foreground color.
When the pick mode is Pick only, the key
doesn't do anything.
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Shift
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By pressing the Shift key, the
Color Picker Information window is opened
when you click on a pixel.
![[Note]](images/note.png)
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The Pointer
window gives you the same information permanently. But
be weary it defaults to Sample merged.
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Normally, tool options are displayed in a window attached under the
Toolbox as soon as you activate a tool. If they are not, you can access
them from the image menu bar through
→ → which opens the option window of the selected tool.
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Sample Merged
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The Sample Merged check-box when enabled will take color
information as a composite from all the visible layers.
Further information regarding Sample Merge is available in
the glossary entry,
Sample Merge.
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Sample Average
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The Radius slider adjusts the size of
the square area that is used to determine an average color
for the final selection. When you keep clicking the layer, the
mouse pointer shows the size of the square or radius.
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Pick Mode
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Pick Only
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The color of the selected pixel will be shown in an
Information Dialog, but not otherwise used.
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Set Foreground Color
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The Foreground color, as shown in the Toolbox Color
Area, will be set to the color of the pixel you click
on.
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Set Background Color
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The Background color, as shown in the Toolbox Color
Area, will be set to the color of the pixel you click
on.
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Add to Palette
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When this option box is checked, the picked color is sent
to the active color palette. see Palette Editor
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Use info window
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When this option is checked, the information window is opened
automatically. The Shift key allows you to
toggle this possibility temporarily.
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