Following tutorial helps to understand the process of resizing layers with Text-It engine, as well as creating  and saving custom styles under the account. Four layers for image A would be resized and result in image B. After completing the tutorial you should be able to scale any image found at Text-It samples page.
Note: The reason you need to resize layers in Text-It and not the downloaded image itself, is because bitmap graphics such as PNG or JPEG would loose quality while resized outside of engine.
 

Image A	Image B