be bionic steeper Technical Manual page 11

Column
This grip moves the thumb into the palm from a non-opposed
position. The fingers then close over the thumb to provide
a fixed column that can be used as a way to push heavier
objects or larger buttons and switches. Column is also the
recommended grip for dressing, as the thumb is kept out of the
way.
Mouse
The thumb and little finger close to hold the side of the mouse,
with the middle and ring fingers providing stability. The index
finger closes on to the mouse button and then backs off to
provide the button press. Each close signal will give a mouse
click whilst an open signal will release the mouse.
Relaxed Hand
The thumb is set to the non-opposed position and partially driven
in toward the palm. All the fingers are driven to a slightly flexed
position.
Applying a further signal will drive the fingers into Hook Grip for a
carrying position.
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