Yeah, what I meant was, how do you alter the current thread so you can move up and down the stack frame as seen in the backtrace of that thread?
current thread is not altered, it's just stopped as long as you don't enter step/cont... commands then up/dn are just indexes to current thread's stack (which doesn't change since it doesn't execute) the up/dn commands are not available on other threads than current
A+