These commands move to a new stack frame and print the name of the function and the values of its arguments in the style of a Lisp function call:
upMove up to the next higher frame. More recent function calls are considered to be higher on the stack.
downMove down to the next lower frame.
topMove to the highest frame.
bottomMove to the lowest frame.
frame [n]Move to the frame with the specified number. Prompts for the number if not supplied.