Cartoon Network HD

2007–2009
On October 15, 2007, Cartoon Network launched its HD simulcast feed under the name "Cartoon Network HD".

2010–2013; 2017–present (USA); 2011–2015 (Europe, United Kingdom, Ireland)
Beginning the week of July 17, 2015, Cartoon Network in Europe, United Kingdom, Ireland removed the HD symbol from its screen-bug. Then in 2 weeks later, on July 28, 2015 Cartoon Network Europe, United Kingdom, Ireland began producing its standard-definition programs in letterbox format. therefore, the HD branding was phased out and high and standard-definition viewers now both see the same picture.

In Late 2017, Cartoon Network standard-definition viewers is no longer HD letterbox format to see the picture and unstretched to 4:3 Standard Definition feed and the return the HD Lower Third. At 6:00am ET on October 1, Cartoon Network brought back the HD symbol from its screen-bug. That means the standard definition programs is back to Cartoon Network on TV.