Gradient Tool
The Gradient tool creates a gradual blend between multiple colors and draw it in several formats. With its transparency mode, you can also "fade" or "blend" two images together.
Gradient Types
Each gradient type can be chosen from the Gradient section of the toolbar:
Drawing a Gradient
To draw a gradient, simply click and drag on the canvas as if you were drawing a line. The gradient will be drawn as you move the mouse which should let you quickly figure out the placement for the gradient you want to draw. The starting point (where the mouse is pressed) and ending point (where the mouse is released) affect the gradient appearance, depending on the Gradient tool used. After you release the mouse button, you will be able to adjust the gradient control points by moving the circular nubs. Right-clicking on a nub will swap the roles of the primary and secondary colors. If you move a nub while holding both mouse buttons, then both nubs will be moved.
The first column of gradients below shows how the gradient looks when drawn in Color mode with two opaque colors (alpha value of 255). The second column shows the effect of drawing a gradient with the Transparency Mode on the following image:
Original design
Linear
Shades from the starting point to the ending point in a straight line.
Linear (Reflected)
Shades using symmetric linear gradients on either side of the starting point.
Diamond
Shades from the starting point outward in a diamond pattern. The ending point defines one corner of the diamond.
Radial
Shades from the starting point to the ending point in a circular pattern.
Conical
Shades in a counterclockwise sweep around the starting point.
Gradient Profile Dialog Box
Profile defined gradient fills
Note: You can also apply Gradient Texture in design. CarpeTools> Create> Textures> Gradient...