TLF provides a ModifyInlineGraphicOperation that is used in the demo TextLayoutEditor project in the GRAPHICS tab on the bottom.  That can be used to modify a selected inlineGraphic by entering new width/height values.  TLF isn't providing any UI that allows a user to select an inlineGraphic, get drag handles and resize the image.  Nothing stopping you from writing that - you'll want to intercept events on the ContainerController.

Hope that helps,

Richard

Get the InlineGraphicElement by textflow.findLeaf(textflow.interactionManager.getSelectionState().anc horPosition) as InlineGraphic;

and then get its attribute *source*

textflow.interactionManager = new EditManager() when you get null object

package
{
    import flash.display.Sprite;
   
    import flashx.textLayout.container.ContainerController;
    import flashx.textLayout.conversion.TextConverter;
    import flashx.textLayout.elements.*;
   
    public class FindLeaf extends Sprite
    {
        public function FindLeaf()
        {
            var markup:String = "<?xml version=\"1.0\" encoding=\"utf-8\"?>"+
                "<TextFlow xmlns=\"http://ns.adobe.com/textLayout/2008\">"+
                "<p><span>Te</span><img source=\"http://www.adobe.com/include/img/truste_seal_eu.gif\" width=\"116\" height=\"33\"/></p>"+
                "</TextFlow>";
            var textFlow:TextFlow = TextConverter.importToFlow(markup,TextConverter.TEXT_LAYOUT_FORMAT);
            var cc:ContainerController = new ContainerController(this, 1000,1000);
            textFlow.flowComposer.addController(cc);
            textFlow.flowComposer.updateAllControllers();
           
            var leaf:FlowLeafElement= textFlow.findLeaf(2);
            trace((leaf as InlineGraphicElement).source);
        }
    }
}