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A filled circle meaning capture rather than play.
Also known as: Rec button, Capture symbol
A solid circle means record. It is deliberately the only round transport control, so that it is distinguishable by touch from play and stop, and it is conventionally coloured red where colour is available.
Starts recording, drawn as a single filled circle among the angular transport controls.
Contexts: Electrical equipment
Is the only circular control in the set so that it can be found by touch, and is conventionally red where colour is used.
Contexts: Electrical equipment
A single solid filled circle, set among angular shapes on a control panel.