"Graphical" "such many pixels" truly a word smith
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"Graphical Settings" is a term that has been used for decades even back when I was a kid in the 80s and when I was working in video game industry in 2000s. It is fine. Graphical in GUI (Graphical User Interface) refers to graphics being used (such as buttons or dials, clickable by mouse cursor or touch) in the place of text input.