Visual elements can be arbitrarily rendered in a code editor. Visual elements can be rendered at any location on a display. Visual elements can include text, images, graphics, video, and/or multi-media. Rendering of visual elements will not obstruct a view of rendered text. Nor will rendering of the...http://www.google.com.au/patents/US7721196?utm_source=gb-gplus-sharePatent US7721196 - Arbitrary rendering of visual elements on a code editor
