To find out if a theme provided by Longwood Blogs allows you to add a custom header image, please go to Appearance>Header. By clicking on Header you will be able to upload a custom header image to be shown at the top of your site instead of the default one. Unfortunately, not all of the themes support customization of header images. In fact, each theme has its own options through which you can customize the look and feel of your blog, so the theme, in effect, is much more than just look and feel- it is also functionality and possibility.
[youtube]https://www.youtube.com/watch?v=TMXt-LRQfT0[/youtube]