Key Assignment Query : Speed Bug

Hi there,Can someone tell me what combination of keys you need to select the speed. This is similar to selecting ctr + shift z selects altitude / ctr + shift h selects heading.ThanksHappy FlyingPaulMy ComputersFlight Rig: E6850 processor, 2gb RAM, GT8800, 42inch Sony Bravia Screen, 19inch instrument scree, Vista Ultimate, FSX +sp1+Accelerator, Saitek 52 plus rudder pedals.I have been a flight simmer since the days of the BBC 1980's. I also pilot a real plane on sunny days. On the whole I am very impressed with FSX/FS9 and so on. Like many people my time seems to be spread over fixing and tweaking, flying and getting things to work.