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Keys Common to Focused and Formula Calculators

Key Description
shift Displays a key's alternate function.
store Used to store the value in the X Register to another variable as displayed on the key label.
recall Used to recall a value from a variable as displayed on the key label.
change sign key Changes the sign of a number or exponent.
enter exponent Starts the entry of an exponent.
delete key Deletes the current value of the X Register or acts as a backspace key of entering a new number of formula
enter key Ends the entry of a new number and lifts the stack.
Exchanges the values of the x register and y register.
Rolls down the values of the stack. See The Automatic Stack for details.
formula button Deletes the current value of the X Register or acts as a backspace key of entering a new number of formula