The Select Color Range tool lets you select noncontiguous, similarly-colored areas of an image.
In the Tool Options pane, customize the options for the Select Color Range tool:
Sample All Layers: Select Sample All Layers to make the Select Color Range tool take into account the contents of every layer in your image, not just the selected layer.
Smooth Edges: Select Smooth Edges to naturally smooth the outline of the Select Color Range tool. With Smooth Edges unselected, the selection outline will be a little more precise but jagged.
Click the canvas to pick a color range, or click the color well in the Tool Options pane to choose a specific color.
Drag the Range slider to adjust how many other color values close to your selected color will be included in the selection.
Click Apply to confirm a selection.