lt="Go back up one level"/></a></h2>
      
                <p>In the previous section we noted that when using layouts
                    you never need to set the position or size of a user-interface
                    component yourself - the layouts take care of it. So how do
                you control the sizes of the components?</p>
                <p>Each layout that arranges multiple items within its drawing area
                    has a sizing property: for horizontal boxes this is <code>Widths