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An arrow entering a rectangle, selecting which device feeds the screen.
Also known as: Source button, AV input symbol
The input or source control selects which connected device the display shows, drawn as an arrow entering a rectangle. It is the control most often needed and least often labelled, because a television has no way to know what a reader has plugged in.
Selects which connected input a display or amplifier shows, drawn as an arrow pointing into a rectangle.
Contexts: Electrical equipment
Is unlabelled by necessity, since the device cannot name what is connected to each input until told.
Contexts: Electrical equipment
A rectangle with an arrow pointing into one of its sides from outside.