The Select By Color tool is designed to select areas of the current layer or image based on color.
The Select By Color Tool can be called in the following order, from the image-menu:
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The Tool can also be called by clicking the tool icon:
Options
The available tool options for Select By Color can be accessed by
double clicking the Select By Color tool icon.
Replace mode will cause any existing selection to be destroyed or replaced when the new selection is created.
Add mode will cause the new selection to be added to any existing selection regions.
Subtract mode will remove the new selection area from any existing selection regions.
Intersection mode will make a new selection from the area where the existing selection region and the new selection region overlap.
This option performs no function for this tool and is present to unify the user interface between the various selection types.
The Radius slider adjusts the amount of feathering in pixels for the next selection that is created. For further information regarding feathering, see the glossary entry Feathering.
Select Transparent Regions: Selects transparent regions (which have no color to select by).
Sample Merged: The color used for the basis of the selection is the combination of the colors at that point in all visible layers.
Threshold: This slider gives control over the range of color values that will be deemed "near" the selection color. A higher number selects a bigger area.