In theory, if you half - press the shutter button, you then can use your fingers to define the lighting settings using a touch and slide motion on the screen. (tomsguide.com)
A simple squeeze - and - slide motion opens the gate, and the red / green indicator shows if it's properly locked. (babycenter.com)
These units are smooth all around, to ensure the safety of those tiny fingers and hands and lock with a simple sliding motion. (ourfamilyworld.com)