The Gira series dimmer is operated by gently pressing the corners of the button. Channel 1 is controlled on the left, channel 2 on the right. The top is for switching on and dimming up, while the bottom is for switching off and dimming down.
By pressing and holding (approx. 4 seconds) the button half way up, the currently set brightness is saved as a memory value, either on the left half for channel 1 or on the right half for channel 2.
Both dimming circuits can be synchronously dimmed up or down by pressing the central axis marked with a line, depending upon whether the upper or lower area is pressed. When the entire surface of the button is pressed and held (approx. 4 seconds), the memory value for both channels is saved.
Both outputs are always synchronously operated and both memory values stored via a connected auxiliary unit.