You can transform a UILoader component horizontally and vertically while
authoring and at run time. While authoring, select the component on the Stage
and use the Free Transform tool or any of the Modify > Transform commands. At
run time, use the setSize() method or the appropriate properties such as the
width, height, scaleX, and scaleY properties.
The sizing behavior of the UILoader component is controlled by the
scaleContent property. When scaleContent is true, the content is scaled to
fit within the bounds of the loader (and is rescaled when setSize() is
called). When scaleContent is false, the size of the component is fixed to
the size of the content and setSize() and the sizing properties have no no
effect.
The UILoader component has no user interface elements to which you can apply styles or skins.