This is not functionality that is part of TLF, but you can put an image on the stage, and then layer the text over it. If the image is a background image for the whole container, this is very straightforward. If it's the background for a paragraph in the container, for example, then you will need to find out where the paragraph is, and aline the image to the paragraph. There's some example code in the ParagraphBounds and ParagraphBorder examples that might be helpful, if that's what you're doing.