hello not sure how usefull this is but here you go..
#1 Power on the scope
#2 Press the buttom "Print/Utility" once
#3 Hold "function bottom" (the 6 buttoms beneath the display) 2 and 3 down at the same time, for half a second
Now your ready to play a game of Tetris!
Important: If you wait to long between pressing "Print/Utility" and holding the functions buttoms down nothing will happen, so be quick!
Have fun
btw i think you have to have a 54600B ... not sure though.