Editing objects, layout parts, and the layout background > Formatting objects, layout parts, and the layout background > Filling objects, layout parts, or the layout background with a color gradient
 
Filling objects, layout parts, or the layout background with a color gradient
Note  Before filling the layout background with a color gradient, make sure the fill for one or more layout parts is transparent. See Setting the fill, line style, and borders for objects, layout parts, and the layout background.
1. In Layout mode, select one or more objects, a part label, or click anywhere in the layout background to select it.
Before selecting the layout background, make sure no objects or layout parts are selected.
2. Click Inspector Inspector button in the layout bar, then click the Appearance Appearance tab.
3. To change the appearance of the object or the body part when it’s in a particular state (for example, when a button is pressed), choose from the object state list (near the top of the tab).
See Specifying the display state for an object.
4. In the Graphic area, for Fill, choose Gradient.
You see the gradient control.
Gradient control
5. Set color gradient options:
 
To
Do this
Specify colors to be blended
Click the color stops Gradient color stop control on the gradient control and choose a color from the color palette.
Add colors to the color gradient
Click anywhere on the gradient control to add more color stops.
Reduce colors in the gradient
Drag color stops off the gradient control.
Change the direction in which the fill is blended
Click Linear gradient button or Radial gradent button.
Change where a linear gradient blends
For Angle, enter a value.
macOS: Drag the angle control Angle control icon.
Change the start and end points of a linear color gradient or the center point and radius of a radial color gradient
On the layout, drag a blue handle of the gradient control on the image.
Radial color gradient and gradient control shown on selected object
Reverse gradient colors left to right or center to outside
Click Change gradient style button.
Change the gradient on the object.
Use the Color gradient control control on the object.
Notes 
Layout background fill does not extend behind navigation parts.