I just got a new 50g and I am using the matrix writer to input the numbers into the linear system solver. In my 48g, if I wanted to use a number out of the stack I would use the from stk soft menu key and it would take me back to the stack where I could select the number I wanted and hit echo and there it was in the matrix.

On the 50g I can only find a "to stk" but there is no "from stk" so how do you solve systems of equations using numbers from the stack.

I already tried shift "to stk" and it works but it will only take the number 1 in the stack, it won't let you pick different numbers from the stack.

Anyone know how to do this?