On the boeings I've there are checklists on the control wheel with a small 'bug' to the right.
How are these used? Is this in addition to company checklists or are they just put there by the manufacturer?
Also is the 'bug' linked to any electronic interface?
If this posts sounds confusing - I was looking at this picture when I came up with these questions:
http://www.airliners.net/open.file/230868/L/