Applying a Preset Gradient to a Selection in Photoshop

Here’s how to apply a preset gradient:
1. Choose the layer from the Layers palette and/or make the selection you want to apply the gradient to.
2. Select the Gradient tool from the Tools palette, or press G or Shift+G until the Gradient tool becomes active.
3. Choose one of the preset gradients from the Options bar list.
4. Choose the method for applying the gradient by clicking one of the icons in the Options bar.
You can select a linear, radial, angle, reflected, or diamond effect.
5. Choose any other options you want from the Options bar.
6. Place the cursor at the position in the layer or selection where you want to place the starting color of the gradient.
7. Drag in any direction to the point you want to place the end color.
Longer drags result in a subtle transition between colors, whereas shorter drags result in a more abrupt transition. Hold down the Shift key to restrain the direction of the gradient to an even 45-degree angle.
8. Release the mouse button to apply the gradient.