Layout is used to organize other objects into groups. Place a layout and if you want a button inside the layout, select the button and start placing it inside the layout. 

When you now move or hide the layout the button will follow.

Layout can have a background image or solid color and a frame.

Properties for UI command:

Top

Left

Right

Bottom

Visible

Fill.Kind

Fill.Color

Stroke.Thickness

Stroke.Kind

Stroke.Color