There are six buttons used only for directly manipulating the
stack: ,
,
,
,
, and
. As noted in the previous example, the
button lifts the stack and then disables lift for
the next operation. This is primarily used for entering two numbers
in succession, but can also be used for propagating a single value
into all four stack registers by pressing it three times.
The and
buttons
rotate the values in the stack registers while preserving all values.
The
button is similar to stack drop except
the x value is moved into the t register. The
button is similar to stack lift except the t value is moved into the
x register. Pressing either of these buttons four times in a row
will result in the register values stored in their original locations.
The button performs a stack drop while
preserving the value in the t register. The
button copies the value in the x register into all the registers in
the stack.
The button exchanges the values in the x
and y registers.
Choosing the RPN Stack menu option opens a dialog that displays all
the registers in the automatic stack. This form also includes the
,
,
, and
stack manipulation buttons.