Gradient Layer

You can change the color of the selected image into a gradient.
After selecting a specific area with area selection, you can also change the color of that area using a gradient.
In the Canvas, you can use Long Press(set starting color) > Drag(set direction and distance) > Release Long Press(sett ending color).
You can only use this feature on image layers.

Gradient Layer
Type Set the shape of the gradient: linear, diamond, radial etc.
Set Starting Color Sets the starting color of the gradient.
Set Ending Color Sets the ending color of the gradient.